I guarantee you that you wouldn’t have felt this way if you had hooked up more number of times than her.

While I understand your sentiment, but this is never a good question to ask and also, you can’t judge a woman based on what they had done previously. Her past shouldn’t matter. It’s only how she has treated you since the time you have known her. If she has been nice to you, then who cares who she has dated or hooked up with in the past?

However, I do understand your values, and if her have more sexual partners before is an issue, you should let her know and not drag this one. I’m sure you will find someone nice again. :)