I suggested my friend a threesome, but I felt jealous on other girl

This weekend i had one of my friends over for drinks. Me and my boyfriend whom live together were all here with friends having a good time. I was in the kitchen and he approaches me about two unattractive girls and says why dont we have a threesome with one of them since weve been discussing it but i say i dont want one with a woman hed be attracted to. So i suggest My friend cause im comfortable with her and she has had this experience before it was a rush of the moment thing so i spoke to her and she agreed. I was scared but a little enticed. We went thru with it the first time i got overwhelmingly jealous because seeing his face having sex with another woman was too much i reacted negatively and suttly showed him my discomfort he didnt acknowledge it at first until i made it physically clear by pushing him away from her. It kept going little by little but it was totally unsuccessful. The next day i spoke with my friend and apologized and asked if we could try again since i know i reacted wrong when technically i pursued this situation for him. We try again n this went well if you wanna consider it that but seeing him doing all this stuff with her and i felt like he was cheating i tried to keep busy but it wasnt working. I fought thru it but was still uncomfortable but this time i didnt show it now everytime i sit i see him being with another person. Its driving me crazy. This was a one time thing but i never thought it would happen. Please help me what should i do.