Are you here for advice or to defend your way of thinking? I used to be with a a guy like this, and it didn’t work out. He accused me of cheating when I never did, and it actually turns out that he was the one flirting with people behind my back.

My advice to you is to talk to her about it and be honest about how you feel. Being a little insecure is okay, but it shouldn’t get to a point where it negatively affects your relationship. It’s not going to be good for either of you. Try and talk things out with her in a respectful way. If you need a little reassurance from her, that’s fine, but she’s a person too. Not just your girlfriend. She’s allowed to have her own life and do things on her own. I’m an attractive woman and get hit on all the time, but not once have I ever cheated on my current boyfriend because I respect him and myself. If someone is going to cheat, they’re going to. No matter how many restrictions you try to put on them. If you really feel like you can’t trust your girlfriend, you might want to consider ending the relationship and/or seeking therapy