Search Results: drunk mistakes

So at a party I ended up kissing one of my friends boyfriends and it was kind of set up to show her that he was a cheat and she can do better. Before this party he was touching other girls up including me, when I told her she didn't believe me, and I heard he kissed a girl from another school as well but it was aparantly only it was only rumours. My friend isn't happy in her relationship as she's constantly crying over him as he always treats her like a nobody. They've been together for over 2 years and it's been going down hill from around the 6 month mark. Everytime they do see each over they only have sex and have nothing to talk about. Another thing is that everytime he gets drunk at parties he always says how he doesn't love her anymore and doesn't want to be with her and she knows this but ignores it. He always tells her what to do and then does it him self like drinking because he doesn't want her to "embarrass him".
Anyways at this party I ended up kissing him and he asked me to give him a bj however I refused as that wasn't part of the plan and it's too far.
Did I do the right thing l? I feel like I've made a mistake now and regret it