[PSY]

A few thoughts:

1. Her idea of "love" isn't the same as your idea of "love" (meaning that she was never as committed to you as you were to her), or she lied about being in love with you.

2. There's nothing wrong with refusing to spend time with someone who hurt your best friend; however, you need to make it clear WHY you're not hanging out with that person, AND you need to make it clear that you still love your girlfriend regardless of whom she decides to spend time with. (I mean, it'd be one thing if she decided to hang out with a drug dealer - it's another thing entirely if you just don't happen to like the guy, but that guy is perfectly nice to your girlfriend.)

3. I'm not seeing a reason as to why she broke up with you - can you elaborate further?

4. Depending on why she broke up with you, it may not be possible to "win her back," and there may not be anything to "make up" to her, because you may not have done anything wrong in the first place.