My boyfriend (21) and i (22, f) have been in a relationship for coming up on two years. We are in a monogamous relationship. My boyfriend is Bisexual and has the opportunity to experiment with a close friend of his that also recently discovered he is Bisexual and I am completely fine with this. Long story short, me and my boyfriend were spending the weekend at this friends house and them experimenting came up. I offered to go shower or go take a nap so they could have some privacy but my boyfriend insisted that I could stay and even join in if the opportunity came. Well, the opportunity did come and we basically ended up having a threesome..kinda. In the end the most that happened was that I swallowed my boyfriend's friends cum, but my boyfriend later mentioned that made his stomach sink. I said thats okay and it won't happen again.

the problem is my boyfriend keeps introducing more and more boundaries that are basically making the threesome into a not threesome. for context I've previously had a threesome, he has not. I openly let him make the boundaries, since I don't many besides obvious consent. Some of the boundaries he has implemented are no sex, no fingering, no contact with my body fluids, on external stimulation, no making me cum. He has also stated himself that anything from the other guy that brings me pleasure gives him a sinking feeling in his stomach.

I've mentioned that I want to be pleasured in this too and he states that I can, by him. I've also offered to just not be involved and he insists that I don't have to do that. I definitely don't want to pressure him to push his boundaries in any way, but is this really even a threesome? the most that happens is me and my boyfriend take turns sucking off his friend or his friend can touch my clit while my boyfriend fucks me ( my boyfriend is on antidepressents so its about 50/50 on if he can get it up).

Am I in the wrong for wanting pleasure out of this not just from my partner? is my boyfriend overthinking?