Whatever happen happened in the past! By letting yourself in this state or having some phobias will only fuck up your next relationship! Being a commitment phobic is one thing but being a charmer and sweet talking girls into falling for you and then after leaving them hanging like this is simply NOT cool.
All I can say is move on and let it go! Don't keep this inside. It will eventually eat you up someday!
It's not like everyday you meet an awesome and perfect girl for you......
Oh well, it's your loss! What can I say?
You will grow old being lonely and by then it will be too late! I'm sorry buddy!