<human>: My girlfriend [23] and I [24] have been going out for a few months and often go out to bars in our local area.  She, admittedly, has hooked up and/or had sex with lots of people.  I am fully aware of the double standard that society has placed on women in regards to being open about sexual exploits, and she knows I am, so she doesn't feel uncomfortable talking with me about guys she has been with; I am conflicted, though: I still feel an incredible amount of anxiety and a little bit of anger whenever we're out and we see someone she has been with.  

Example: we were out the other night, and she waves at a guy and he smiles and waves back, just a friendly gesture.  She says to me 'I blew that guy in the bar parking lot before we (me and my girlfriend) started going out.'  I wanted to explode, but i kept my mouth shut.  All I could think about was that her mouth was around that guys dick... I know it's incredibly immature of me to think that way, but I don't know how to get over it.   Is it normal for me to feel this way?  Are there any tips, tricks, or methods to overcoming this kind of anxiety?  I want her to be able to talk to me about whatever she wants, but am I better off telling her not to tell me about any of that stuff anymore?  I feel like I shouldn't be allowed to be angry, but I can't help it.  I really would love any kind of advice and/or opinions, thank you.

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<bot>: my girlfriend used to hook up with a lot of dudes and when we see them out, she tells me, and i get angry and anxious.  how do i get over it?