I posted on the relationships board about some problems I'm having with my twin sister. I find myself getting increasingly frustrated and angry with her and I can't let it go. These emotions are effecting me to the point that I have dreams about the situation with her at night and wake up angry. I don't know why I can't let it go. The anger makes my generalized anxiety worse and some days, especially if she's been texting me incessantly, it's consuming.