She probably wanted to break up because you’re no longer making her feel those good feelings that you made her feel when you were with her. So unless your feelings make her feel good then your feelings don’t matter to her. I find that with women it’s more effective to make her feel something good than to try and reason things with them. For example you’re better off serving her and making her feel good than trying to reason with her by telling her something along the lines of ” well how do you think that I feel?”
You have the opportunity to handle this with class by telling her something along the lines of “Hey I find myself missing you, I had a great time getting to know you”… And leave it at that 🙂