What is the next move for me?

Hi Joshua, what you are feeling it completely normal. You are besotted with this girl and it hurts to think of her with anyone else. Now I don't think the feeling will completely disappear, it may take time. You have just got to remember that she has chosen you at the end of the day. Only have sex with her if you feel you are ready, not because you want to impress her compared to her exes. She is showing that she trusts you to be able to confide in you about her past sexual nature, that is a very hard thing to do and I can imagine she feels exposed right now so it's important you still make her feel loved and not show it has affected you. Continue to treat her like a princess because it sounds like you too belong together. Good luck!