What would you do ? Please help... I care about this one alot
If I were you, I'd let her go and I'd find someone else who would at least have the communication skills to tell you that what you were giving her wasn't enough so that you could at least have the chance to remedy. She told you nothing and just kept you the way things were until she found someone else. Lame and weak of her IMNHO.
Christ if she wasn't satisfied then she should have at least asked you to step it up, to become exclusive together or she'd have to find someone who could and would. How can you remedy something when you think whats going on is fine and acceptable to the other?
I think you're better off finding someone who cares enough about you to at least ask for what she wants from you.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion