I don't think it was the ML part that was bothersome, it was the fact that he was drunk when he did it is the issue. If he came to you and respectfully asked you for sex while sober, then it would be a good sign. But drunk? When he can say that you did something and not take ownership for anything he's done, then it's a problem.
What if you told him 'no' and he had forced himself on you? He could have pulled the same argument that 'you' wanted it.
I really hope you do plan to talk to him soon if you are planning to go to R still.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.