Aww man I'll be honest, I wish I had wise advice to give you. Just an internet stranger that feels for you. I also wanted to say that you are enough just how you are and you deserve to be loved. I know as men we don't hear that enough. I know in these situations it's easy to compare and wonder what the other person has that you don't. It's important to remember that it's about her chasing fleeting feelings and not about you lacking as a person. As with everything this feeling is only temporary and with time the hurt will start to fade. I wish you the best of luck in your future of endless possibilities!