Trying to put myself in her shoes, I can see how she's looking for security given how close she is to the end of her biological clock, and how much time she's invested in you. Right now she is pissed that she spent all that time on you, and now she's only got a few years left to pop out a kid and pass on her genes.
If she wants kids and you don't, then breaking up is the right thing to do. I don't get this "I don't wanna be the girlfriend" bullshit though. When it comes to commitment, getting married isn't gonna change anything. They're easily broken, so the level of commitment is no different than in a normal LTR. Marriage is meaningless in today's society. If you're religious, just do a private marriage. Seriously, if you want to be together, just be together. What would calling yourselves married change?
One of my best friends knocked up his girlfriend a couple years ago. They bought a house together and now they're expecting their second child. My aunt's stepson knocked up his girlfriend and they're about to move into my aunt's old house. For all intents and purpose, there's no difference between them and a typical married couple.
If a girl ever tried to trap me into marriage, but I wanted to have kids with her, I'd do what I could to allay her fears of rejection while playing up my commitment. "What would marriage change?" "I've been with you this long, and I'm in it for the long haul. I want you to be the mother of my children and grow old with you. We can have a ceremony if you want, but a piece of paper that says we're married isn't going to change anything. Why do you want to bring the government into our home?" Or something like that.
But anyway back to your situation. Sounds like you're on the right track. Save up some money, work on your game and style, and book a trip to the Philippines.