As others have said, it is your issue and you need to own it and deal with it on your own. You never know, she may be having thoughts about dating someone who isn't as experienced as she is. So it could go both ways.
Here are two things that may help:
1) Never ask another question you aren't prepared for the answer.
and 2) If you really think she is your soul mate, the one, etc. then ask yourself this - Would you rather be her first or her last?
Good luck.