AnyOtherDay

I had the usual crush on the girl next door but she had a girlfriend. I respected that for about 4 months, but then, for whatever reason, she started to stay the night. We never had sex but we would sleep next to each other at least 5 out of 7 nights of the week. So then after a month of that I decided I would make my move. So it started off as just fingering and she was giving me a hand job. Then I wanted to go further but she said no because she had a girlfriend. I thought that was wierd but maybe her morals kicked it and realized that what she was doing was wrong. She would still spend the night and sleep in the same bed as me but she didnt let me start anything. Then all of the sudden she said she was engaged!!! At first I thought it was the girlfriend, but it turned out to be an old boyfriend that came back from the army. Even though she now had a boyfriend and the girlfriend (who didnt know about each other), she would still end up sleeping over at my house. Then about 2 weeks into the engagement she realized that she wanted to have sex with me before she got married to the army guy. Of course being a guy, I thought with the wrong head...
And from that point on it was a total downfall. She ended up coming over and we would just have sex ontop of sex. I even ended up going to a club with this girl and her fiance, and she got up enough nerve to start making out with me while the guy was in the bathroom. But now things are settling down. She broke it off with the girlfriend and fiance. But due to the way we started this relationship, I have a hard time trusting her. She says that she is faithful but something in my gut is turning and I cant tell if I am paranoid or crazy for continuing a relationship built on an affair.