<human>: So basically, I met my current Girlfriend in college.

When we met, I was going out with my Ex-Girlfriend of 1.5 years at that time. This was about 5 years ago. About 6 months after my ex and I broke up, and I decided I should just focus on my studies (I was in med-school) and because I just wanted to be single for awhile. I had some girls ask me out, and I was into some girls, but ultimately I felt I wasn't ready for a relationship/or the girl wasn't right.

About a Year after we met she started going out with a mutual friend of ours. And they went out for about 3 years or so, having broken up over 1 year ago (he broke up with her if that matters).

About 8 months later we told each other we liked each other, and we started going out (I talked to her ex, who actually at that time wanted to get back with her. But she wanted to be with me instead, but he was still kinda cool with it). 

She's only had two boyfriends, and never had sex, but done almost everything besides having sex. This was recently brought up randomly, I knew before we went out that this was possible, but now I know for sure. I feel like it  SHOULDN'T bug me. I think shes awesome, funny, etc. 

But I can't help it. It bugs me. Maybe it's because I know the guy. Maybe I feel less special, or less worthy. Idk. I really don't want it to bug me Reddit, what should I do?

As for me I've had one serious relationship (went all the way to sex), and hooked up with a few girls. Some wanted to go further than making out i.e Sex, Give me Head, etc. but tbh I don't enjoy hooking up with random girls so I said no. I just did it because everyone told me its tons of fun, etc.

Give me the gist of the text in a nutshell
<bot>: Having a hard time getting over girlfriends past, she went out with a mutual friend before me for many years (serious relationship). Recently found out how far they had gone. How do I get over it?