I wouldn't worry about it as a simple premonition like that. As Thunder Bow says, the other people in dreams are usually parts of ourselves. You might start by thinking about the ways you are similar to your friend. And then maybe the dream is saying that you have these other qualities in you--that you have a depressed side, that you have thoughts and feelings that trigger you, and feel like you are sabotaging yourself in some way. Usually the dream is trying to bring something to your awareness that you don't normally acknowledge, so the dream is asking you to become aware of these qualities in yourself.