fucked up bad...

So my boyfriend and I have been talking playfully about threesome with another guy. He's mentioned his friend for awhile now. Well last night we were all hanging out and well his friend ate me out while I sucked my boyfriends dick. Then we switched and my boyfriend was fingering my pussy and ass while I was sucking his friends dick. His friend came in my mouth and I swallowed to be honest I didn't realize until I swallowed that he came. He didn't say anything. Anyway, my boyfriend didn't know it would bother him until it happened. He's not mad at his friend. He's equally disappointed in me and himself. I do have a sex past that's bad. I never faced it and now it's ruining my life. I should have spoken up and said no we are still working on our relationship. It happened all so quick. But my boyfriend isn't sure what to do. I am just pissed at myself. I need the help with my sex problem and not depend on sex to make me happy. I just hope he will give me a chance to show him I am going to get the help.