My BFs FWB is my friend

The last time they had a sexual interaction was 4-5 months ago.

I’m honestly surprised and have no idea how to feel about it all. It feels so weird to know they’ve seen each other naked and that he once had a hard on for her and more 😩😩😩😩😩

My bf and his FWB have known each other for 2 years. I’ve known him since Jan 2020. He introduced me to his friends and she is one of them. We’ve (him and his friends) become close during the lockdown by talking daily together on video.

There was a point just before he and I became a couple when I asked him if anything happened between them and he just replied with “we were never in a relationship”. I guess I just assumed that meant nothing sexual either (dumb I know)

He just made it seem like she really liked him and he told her that it wasn’t going to turn into anything more.

I asked him because she said she was not over a guy, but she didn’t tell me it was him, I just had a hunch so I asked him.

Him and I started dating officially January, just a couple months ago. We were talking and for some reason I asked that question again and he replied with the same thing, so I asked him “I don’t mean relationship, did anything sexual happen?” And he told me yes.

We didn’t announce it to all his friends that were dating because he told me that this girl (the ex FWB) is still not over him and she’s not mentally stable. Which is true. So anytime we all hang out together, we don’t act like a couple.

Anyway now he’s telling me that he will do anything I want him to do to make me comfortable. I just don’t know how to feel or what to do. Help!!!! 😩😩

I’m sorry if this doesn’t make sense but I’ll answer any questions you have, just help me please 😩