Quote:
She said that the reason we arnt getting back together yet is because she loves me sometimes and sometimes she doesnt.
That doesn't sound like she is your girlfriend.
When girls are like this it generally means they are bored. Whatever spark was there to begin with has dwindled, it's a pretty common thing. Many guys are able to land a girl acting like a PUA, but then turn around when they get in a relationship and go back to old habits that got them single in the first place.
Start acting like the man she met. Don't over-exaggerate the small things. If she starts to get argumentative, change the subject and get back into a positive frame. That being said, don't let her push you around, but definitely don't be the one to get angry and super argumentative back. Girls hate it when you refuse to argue, and she's bound to start noticing if she's the one starting all the arguments or not.