I need unbiased opinions

So yesterday was my 21st birthday. I had a party at my friends house and my boyfriend got black out drunk before 11 o clock. I've been with him 7 years and I've only seen him drink like this once before. He literally fell asleep in the garage door. While me and my friend helped him up and tried to lay him down on the floor he grabbed my friends ass she quickly said "I'm not your girlfriend" and he fell to the floor he obviously wasn't coherent enough to remember this but after this happened my friend (who was also very drunk) ran to her bf and said she was assaulted by my boyfriend and her boyfriend laughed at her so she literally started beating him up she broke his finger, scratched his entire neck, gave him a huge black eye, kicking him you name it me and three other guys tried to stop her and calm her down but she just kept screaming "HE ASSAULTED ME AND YOU DONT CARE" at her boyfriend I, at this point wa son tears cause I felt like this was all my fault and def not how I pictured my 21st birthday so her bf eventually left and I guess he broke up with her she called me in the morning and came over she still is claiming she was violated by my bf I told her that I was sorry and my bf also apologized he said he had. O recollection and actually cried... also never seen him do that I was so mad at him and now my friend is trying to convince me that that's cheating and I should come live with her but I don't know if she genuinely feels like this or she's upset because her bf dumped her and she's getting kicked out and she's scared to be alone I'm still really upset with my boyfriend but I don't think it's worth throwing away 7 years of our amazon relationship. What do you guys think? Am I being blinded by love?