Are you willing to be patient and let your girlfriend let your words sink in? You aren't her ex, and now that you've reminded her of that, does she deserve a chance to trust herself enough to trust you not to hurt her? All I'm suggesting is keep talking to each other and give yourself a chance to prove your words are real.
Of course, maybe she's better off without someone who would run at the first hint of things not being perfect. We all know how perfect life and people are right? She's learned the hard way that life and people aren't perfect.