19F - passed around by Bf’s friends

Soo my bf likes sharing me, slutting me out, is a cuck. I like being shared and freeuse. We established that pretty early on in our relationship, and eventually started doing all that. His friends, off apps, if I was at a party and met someone, wherever/whoever, whether he was there or not. Ofc he just said that if he wasn’t there to tell him before or after the fact. Usually if I hook up with one of his friends he’s normally there/participating, but there’s been times where he hasn’t been, and it’s all been cool. Its happened enough times where eventually I just figured it was a known thing and I didn’t see the need to tell him (like I’ve been with basically everyone in his friend group that is into the concept or knows about our arrangement) which in hindsight is where I first went wrong.

One of his friends, M, was throwing a Super Bowl party. My bf works at a sports bar so obvs couldn’t get the day off but I went anyways. Most of his friends were there and a few people I didn’t know. The games over, things are winding down, people are leaving till it’s me and 5 of my bf’s friends. I’m sitting next to M and another friend when he starts getting touchy, arm around my shoulder, hand rubbing my thigh. The friend on the other side of me starts doing the same too, and I’m getting into it pretty quick. People’s clothes are coming off, I’m half naked on the couch giving M a blowjob while someone’s eating me out from behind. The most I’d done before this is threesomes and 5 was honestly a bit overwhelming and I kinda just went with the flow. It was mostly a lot of spitroasting action as they kept taking turns

And it really just didn’t cross my mind to my boyfriend that heyyy, 5 of your buddies just passed me around in one night, bc yknow, I’d been with all of them at least once before without any issue. So he starts hearing bits of it from them a few days later and then confronts me about it and I’m all confused about why he’s angry about it and we have a whole argument. And I get that I didn’t communicate like he asked and a whole like gangbang without him there or his knowledge also crossed a line and long story short I’m single now