<human>: I[29m] started dating my girlfriend[28f] a year and a half ago. And I knew from the start that she wasn't a virgin. I got that and accepted that. A part of me does get jealous when it's brought up even when I know rationally it was before me, but I do my best to compartmentalize it. 

There have been times when she has said unsavory details about her past before, like about how one guy she used to date loved to have sex with her in public and she pointed out all the places. I get that it was a slip up and all.

But the recent ones, have been in front of my friends and it makes me look like a loser. She has told people that she used to date now a NBA player in college. That ended up having my receive a lot of jokes. But then last night my friends were over and we (just guys) were talking about the number of times we have had masturbated most in a day and then someone switched to the number of times we have had sex in a day. I said four, and then my girlfriend who was in the kitchen came in and said eleven. And all of my friends just started laughing. And when they asked her if it was with NBA guy she grinned and said yes. 

My entire face went red, and since then I have been receiving tons of jokes from my friends and it makes me feel like a cuckold. I still love her, but I don't know how to really move forward. There is a part of me that hates that my girlfriend's sexual highlight reel will always be in the past. And there is a part of me that hates that.

Could you distill the essence of the text into 1-3 sentences?
<bot>: as title states, I found out now I am upset. I feel that her actions make me look like a fucking loser. My friends lost respect for me for staying in this relationship.