I have recently become incredibly jealous of my best friend. I feel terrible about it. We both started dating new men around the same time last year, but while her relationship has become serious enough for her to move in with her boyfriend, mine ended a few months ago. I know that none of this is my friend’s fault, and that I am being irrational and unfair, but I can’t help feeling like she has everything I want. I just don't know what to do.