... like you need to sit down with her in a private place and have a serious heart to heart talk about this. Make sure she understands before it starts that you need a serious talk and that she needs to hear you out. Don't be confrontational or accusational (it might give her an excuse to be the same), but tell her what you told us, the way you told us. Tell her that you love her and that you want to be with her and not with anyone else. Tell her that you can't change the fact that there are other girls in the world, but that she's the only one you care about. Ask her what she thinks you should do when a girl walks in front of you or when there happens to be a girl in your range of vision. If it comes to it, ask her if she would do the same for guys, if she would avoid even innocently glancing at any guy who crosses her line of sight. Ask her what she would think if you accused her of constantly looking at guys who happened to be near her. Tell her that her constant accusations are hurting you and that you need her to be more understanding. If you have to, you can even ask her if she's doing what you suggested here, if she's trying to push you away, tell her that's what it feels like when she does this. Tell her that you trust her, and ask her if she trusts you. If you've been together a long time and she didn't used to do this, ask her what's changed.

If she insists on being crazy about it despite any and all rational attempts to discuss it and to compare what you do to what she does, then man, I don't know. You need trust in a relationship. You need to find out from her why she's doing it, what's going on in her mind, what her reasons are. And a calm, sit-down, rational talk is probably the only way you're going to get that. Until you get what you think is an honest answer from her, it's not safe to assume. Girls are complicated after all. And weird. Definitely weird. :p

On the other ear, try not to let her dismiss your concerns or walk all over you with accusations. But I know that can be tricky when two people have been together for some time. I wish you a lot of luck and good fortune.