It sounds like you're feeling some anxiety about your friend in your waking life. Or about yourself, and how the 'loss' of a loved one would be devastating.

Is she/he currently going through a difficult time with love, money, or family?
Do you have an 'intuition' of feeling about her/his emotional state?
Do you feel as though you may have said something to upset her/him?
Are you, or your 'treasured one', facing a situation where re-location may be a possibility?

If the dream happens again, tell your friend of your concerns for their 'welfare'. Let them know how much they mean to you.

Hope this helps, Good Luck!