Bisexual in a long-term relationship, but a friend made a move on me. What should I do?

So I’m bisexual and in a long term AMAZING relationship with my boyfriend. Befor I met him I become friends w this girl (also lgbt) and always had like a little crush on her but never told her or initiated anything because I love my boyfriend and want to be with him for the rest of my life, well yesterday her and I were hanging out and we got drunk. She confessed that since we met she’s liked me and told me she wanted to have s*x w me. She was very persistent and even tried making moves on me knowing I have a boyfriend. She’s polyamorous and has a boyfriend who is okay with her being with other people. My boyfriend is the typical “I’m fine with it as long as I can watch” but I’m very uncomfortable about it. It also made me really confused because a girl has never made moves on me like that. I love being friends with her but after yesterday idk what to do. I told my boyfriend and he said “well, I trust you but I am a little uncomfortable about you guys being friends”. Has anyone been in a similar situation or have advice???