Why Do I Keep Hurting My Girlfriend?

I don’t physically abuse my girlfriend, but whenever we’re in arguments I always end it by saying, ”we’re done”. It’s always about the guys she’s been with, street dudes, and I’m not a street dude at all. She said I woke her up about them, that they cared more about the streets than her. What’s the definition of a street dude? A drug dealer. I’m as legit as they come, but I can’t feel to help that I’m only half of what she wants.