Thanks xdude.
In the couple days I had to think, I realized that I was wrong for thinking I deserved to know where she was and who she was with. That's not what this relationship is. I am over-complicating things, obviously. She came to me after six months (which were supposed to be permanent) and when she did, I remember my first thought was "Oh brother, here we go again". And as a result, I put little care into our interactions. The sex is what led me to believe I had a right to know and influence what she is doing in her other time. I can't control it. She will do what she is going to do. I should accept that I will only be with her when I am with her. And apparently that is once every couple of weeks and I am lucky I get even that. I will only go nuts If I try to find out the truth about her. I should just enjoy what I get and live my life outside of the time I spend with her. That's what she does.
So I've vowed to myself that I will hang out with her or talk to her only if she initiates it. I can't continue to put myself out there. That only makes this more complicated and less desirable. I mean even then she just called me twice tonight and I didn't feel any good reason to pick up. I'll just have to play this game and see what I get.