Your girlfriend is clearly not ready to let go of her ex-boyfriend. When you start to be the warden in the relationship and have to police her Facebook, her phone and probably her e-mail next, you’re in an unhealthy relationship. Accept that she doesn’t want the same thing that you do and decide whether or not to stay. If you stay, you have to let go of your feelings about her ex because if you don’t, you’ll be fighting with her (and him) constantly. But from what you’ve written about yourself, I think you want someone you feel is 100 percent committed to you and the relationship with you — and she isn’t that person. 🙁