Stranger/People - Usually our dreams are filled with people. We dream about our families, our friends, our neighbors, and our classmates. We dream about strangers, colleges, famous people, teachers, and, at times, our supposed enemies. Each dream is very special and carries its own unique message. When interpreting this dream with people in it, consider all of the details and the feelings in the dream. If the person is known to you, or reminds you of someone you know, think about your relationship with him or her and the issues that the dream has brought up.

Strangers - Sometimes, strangers in your dreams represent different, known and unknown, aspects of yourself. They are extensions and projections of your own subconscious, and personality.
We learn about ourselves through others, and probably our most valuable possessions are our relationships.

If these people are totally unrecognizable (they don't remind you of anyone you know), then they would represent different aspects of yourself.
Human beings, male and female alike, are curious, questioning, and have a need for information, and spiritual expansion. But... we all have masculine and feminine aspects, or sides to our subconscious, and psyche.
The masculine aspects would be the part of ourselves that we view as brave, strong, stubbornness, authoritative, logical...etc.
The feminine aspects would be the part of ourselves that we view as emotional, nurturing, tender, yielding, sensitive...etc.
When we dream, all the different parts of our 'inner selves' interact, and 'come alive', as though they were different people.

Argument - There are two sides to an argument or quarrel, and such dream may relate to an actual dispute. This may not be necessarily between you and another person, but between one side of your personality and another. In waking life you may be faced with a difficult decision, and the opposing facts may be difficult to balance. It is very important to know who won the argument in the dream or how the quarrel was resolved, it may give you more clues to the course you should take in waking life.

Ran Away - suggests something, or someone, in your life is difficult to face, and you would rather run away from it than face it.

Field - represents natural feelings and emotions within yourself, freedom from social pressures, sense of yourself when you are away from other people with your own inclinations, your 'field' of activity or study, and your feeling states: depending on the condition of the field...overgrown and dying or lush and fertile...etc.

Crying - In our dreams we experience a variety of emotions. Crying in the dream state generally has the same meaning as crying in daily life. It is a release of negative emotion, frustration, or fear.
On the other hand, you could be experiencing the tears of joy. Due to repression or denial, sometimes people are unable to express their feelings. In the dream state some of our defense mechanisms may relax and an emotional release occurs. Some emotional dreams may be compensatory in nature. Thus, if you never cry in daily life, you may cry in your dreams.

Mosquito net(tangled up) - Netting is a symbol of confinement, anxiety and apprehension. Getting tangled in a net means that you are tempted to do something unfair towards someone. In women's dreams a net mostly represents erotic or sexual needs, the desire for emotional connection. A woman subconsciously wants to be "caught in a man's net".

Fence - A fence has two meanings: an obstacle or protection.
It is very important to know if the fence is blocking your path or surrounding a property. If you are standing in front of a fence, you need to put some effort in order to overcome an obstacle.
It may be symbols of personal separation in a negative sense or protection in a positive one. These meanings are often derived specifically from whom the fence is separating us from. If you can discern a feeling about what may happen if the fence were crossed (would it be better or worse), that may tell the role the fence is playing in the dream.
Fences can also be a source of boundary. This is true if there is a sense that the fence cannot be crossed. Examine the boundaries of your life in relation to other characters in your dream. Perhaps you want to change those boundaries and move a relationship in a new direction.

Best friend:
Friends - Our dreams are full of symbolism with their messengers being all different types of people. It is very common to dream about our friends. These are individuals that are emotionally valuable to us, and we learn about ourselves through them.
This dream is more than likely attempting to bring up uncomfortable feelings that you have about yourself, others...or more specifically, your relationship with your friend. (Remember "uncomfortable" does not necessarily mean bad).

Clothing:
Clothing represents the roles that we play in life and how we want others to perceive us.
Too tight - suggests you are feeling too restricted in attitude, being 'tight' emotionally.
Too big - suggests being open minded...or too much so. Also suggests trying to hide the 'real you', keeping your emotions hidden, or not easily seen.
Inappropriate - represents attitudes or behavior that is inappropriate to your situation.

Underwear - represent intimate sexual feelings:
Bra - signifies support and protection.. the hidden source of your true energy, the thing that holds you up and gives you support.  Alternatively, it may represent your nurturing side and maternal feelings.
Pink - a feminine color that usually symbolizes love,(tender love rather than passionate love IE: the love for a child, sibling, or parent), happiness, joy, compassion, the attainment of a goal(success), health and good feelings.
Green - has always stood for vegetation and nature. Green is growth, connection to nature, and innocence. Also, peace, tranquillity, the Earth, and money.
Dark green calls up a negative attitude towards life, exhaustion, breathing difficulties, tension, sleep disorders and paranoia.
Bright green refers to overwhelming emotions.
Green that is soft and pleasant stands for relaxation, contentment, sensitivity, hopes and self-confidence.

Pants: You said 'pants'...but I'm unsure as to whether or not you meant panties. So I gave the symbolization for both....

Panties - represents your feminine attitudes and feelings.... or covering up your sexual feelings. It reflects a female point of view. It may also indicate your need to get to the bottom of things. You may want to find a way out of a situation.
Pants - suggests that you are questioning your role in some situation. Consider the material of the pants for additional interpretation....Example:  velvet pants, signifies your sensual side....etc.
Purple - royalty, wealth, dignity, authority, political power and wealth( in the sense of dishonesty and wickedness). Spirituality, status in your own circle, increased social life:or the desire for same,
It is a strong color that can not be ignored. Likewise, most people have a strong opinion of purple: they really like it, or vehemently dislike it. To some people, purple has spiritual connotations. The Catholic Church uses it at funerals and around Easter time. It represents spiritual and personal transformation.
May symbolize mystery and therefore represent, in psychological terms, deep intuition or awareness of some type as yet unexplored dimension of the self, or your true self. A version of purple is also the color of the crown Chakra, and as such it could represent higher consciousness and spiritual protection. 

People behind friend laughing at her -
Laughing - symbolizes release of tension, an attempt to put others at ease, feeling embarrassed by some aspect of yourself, takings things lightly, attempt to hide the truth, also sometimes used to hide tears or sadness.

Sex - Basic Meaning: Merging of energies, aspects or qualities within yourself, (a psychological completion and the integration of contrasting aspects of the 'Self')
Sexual dreams are not about sex exclusively. Often they are about how we perceive people and how we think others are perceiving us.
Having sex in a dream is may be a straightforward expression of sexual desire. Sex with someone other than your 'real life' partner may express desire for that person and/or dissatisfaction with your actual partner.
Your partner in the dream may symbolize some part of your own psyche, and the sexual act will then be a symbol of the union of opposites which leads to wholeness and balance in your personality.

Uninhibited sex - suggests your actual sex life is inhibited, or repressed. Revealing of patterns in your sexual relationships that you have not been aware of.
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Are you having a situation, in your waking life, that involves sex?
Are you embarrassed by sex, or the talk of it?
Are you attracted to someone you feel you shouldn't be?
Do you feel vulnerable in some area of your life?
Are you being pressured by someone into doing something you feel is wrong?
Do you feel as though someone has let you down, or that you have let someone else down?
Do you feel as though there is a barrier between you and your friend in your waking life?...or an internal barrier between you, a side of yourself that your friend represents?
Are you feeling the need to get away, or 'be free'?
Is there something, or someone you don't want to face?...something, someone, or situation you want to 'just go away'?

Hope this gives you something to go on. Best of luck!