It's not self-centered if you truly care about another person and want to express that they are a lovely, kind, and a worthy person. You don't know what kind of emotional baggage she may be carrying -- why she has a pattern of permitting young men to treat her in this way. Perhaps there are emotional or home issues that go deeper than you realize. She may not feel good about herself, who knows. Therefore, treat her with utmost respect and dignity and be aware that it may be a complex issue. Don't go in trying to save her or express that you want something from her. Just express yourself from the heart and listen. I would bet she has a lot to say. Take it slow and follow her lead after expressing yourself by asking her opinion about what she wants or thinks. She's probably had her share of aggressive guys. Good luck. You seem very well-intentioned and kind.