help me please.

so i’m bi. this one girl has been my best friend for a good amount of time. we caught feels and i asked her out but she was hung over her ex so she went back to him but it was understandable i was okay about it. we were still good friends after that. so one drunken/high af night, me, her, her bf, our other friend and her man were hanging out. and i was really fucked up so she went home cause she couldn’t sleep out. my other friend and her man went to chill alone so me and her bf were in a tent just talking and i said my head was spinning so i laid down and closed my eyes and he was fucked yo too and next thing you know he kissed me and i ran out. i didn’t tell her cause i wanted to protect her feelings it had nothing to do with my hiding what happened. she recently found out and now she blocked me and won’t talk to me. my other friend that wasn’t involved just told me to show her that she’s special to me but i don’t know how because i’m really depressed at the moment even since the day she found out. what do i do to show her she means a lot to me and to say i’m sorry without actually saying it. please help me. 😔😔