So my ex-gf and I are trying to be friends, and it seems to be working. I wasn't really ticked off when we broke up, even though I probably should have been. Now she comes up to visit me like 5 months after we broke up and she insists that I go hang out with her "friend", who I immediately knew she was into. I'm sure she came up here to see him as much as to see me. So they start dancing and all that lovey dovey shit, and I just stand there trying to conceal my anger. Not that there's anything wrong with what's going on - she can see any guy she wants. But the idea of it gets me so angry! Especially seeing it happen! She stayed at my place (on the couch) and the next day she wants me to hang out with her and this guy, again. I weasiled my way out of it. And it all made me so mad! Am I wrong to get angry? Is she wrong to want me to hang out with this guy? I'm 25 and have had other girlfriends, though this girl was my first serious girlfriend. I've seen my friends go through shitty situations but never have myself, so I don't know what to make of it. What I really need is to replace her, fast, because every thought of her with someone else just pisses me off to no end. Although, to my credit, I conceal it completely (as far as I can tell).
You probably won't get over it until you either find someone you really care about or just cut off contact with her. I'm going through the same thing man, dealing with knowing the one person that meant love to you being with someone else - it's poison to the soul and no matter how altruistic you are or how much you are over her it's gonna hurt. Don't replace her with someone (unless you love them, then of course!!). Ask yourself this: "Do I still want to be with her?" If the answer is yes than you need to stop contact or you will continue to hurt yourself. If the answer is no tell yourself this: "Me and her have different paths in life, we had are time, but I do not need her nor do I want her, she is free, I am happy for her, because I know that someday I will feel the same way toward someone else" Other than this man not much you can do other than smile and nod. I find that the worse thing you can do is compare yourself to the other guy. Next time she dances with the guy you go find yourself a pretty girl and go dance with her. I feel you though man its hard...
She sounds a little bit of a nutter if she is dancing with him in front of you. I would be angry and I would want to break it off as well.