We’ve been best friends for four years and it’s hard to keep things in perspective but I feel so angry at her. I don’t know what to do if they start dating because I feel like I’ll want to terminate my friendship with her but I don’t want to lose her. I feel so betrayed and whenever I see them together it makes me feel sick for hours. I feel like my reaction is totally justified but based on other people’s reactions when I tell them how I feel and her reaction when I tried to tell her that the situation was affecting me more than I let on, it seems like other people wouldn’t react as strongly as me but I’m doing everything I can to not feel this way and it’s not working. Any advice for getting over a perceived betrayal like this?