<human>: Can you condense the text into a few key points?

I have been officially seeing my girlfriend for about three months and I feel like my insecurity is getting in the way of our relationship. Just to preface this, this summer my previous girlfriend cheated on me and lied about it. I feel like that experience is contributing somewhat to my emotions now. Let me say first, however, I trust my current girlfriend completely. I do not think she would cheat on me. The issues I'm having are more towards my competition with other guys. My girlfriend is very attractive and consequently, many guys flirt with her. This bothers me. Whether or not she flirts back is unclear but she has confided to me that she is very insecure and seeks validation. we had a talk about this in which I made it very clear that I understand her desire for validation but I wouldn't want her to pursue it from other guys. After that conversation I felt like I was in the wrong and being too controlling. Another thing that has been bothering me is that she tells me a lot about the guys that flirt with her and the guys she's dated and it makes me feel uncomfortable and like I have to compete for her affection. Also, some of the guys in my school spoke about her very objectively and sexually recently which pissed me off and made me self-conscious. I don't know how to address that issue. Basically I'm wondering if I should even be in a relationship that is causing me more stress than happiness. There have been times when I've felt comfortable and relaxed around her but lately I've been over thinking it a lot and don't know what I should do.
<bot>: my girlfriend is attractive and insecure. Sometimes guys flirt with her and that makes me feel like I'm competing. I feel my insecurity is getting in the way of our relationship.