One of the major problems I have is whenever I see a girl for any length of time I start thinking that she is a slut and if she doesn't answer when I call her she might be doing something with some other guy.

Currently I am messing around with some girl (Lisa) that I don't even want a relationship with (she is hot but too ditsy). So why would I be jealous if she flirts with another guy? I even jokingly say don't get any guys numbers tonight that I wouldn't approve of. The other night I went out with a bunch of guys and was having a good time then Lisa showed up to the same bar with her friend. I was disappointed that she showed up because it was going to be harder to game other girls. So I told her my friends wanted to go to a bar down the street. After opening a few sets at the other bar, I felt real good and had a high energy. Then me and my buddies went to a different bar and I seen Lisa grinding with some guy on the dance floor. My confidence took a nose dive after this. I couldn't open another set. She called me when the bar closed and she was kind of drunk so I told her I would give her and her friend a ride home since the guys I went with were all going to the strip club and I didn't want to go ( I think did it too because I wanted to insure she wouldn't go home with another guy). I stood out side the bar waiting for her and her friend to get done talking to every guy outside. Needless to say they were both drunk falling down and being ditsy and all the bouncers were out side laughing at them. She's good looking and a good fuck, but is it time to get rid of this girl I've only known her for 2 weeks and fucked her 5 times? How can I prevent myself from getting jealous in the future?

Work on your inner game and self confidence!