As one who has , a few too many times to mention, been more than a little the worse for wear, i can say that i have done things that perhaps had i not been totally paraletic i might not have done in a billion years !!!
When you are that drunk, assuming you dont know this already ??? you dont know what you have said, done , had done to you ( hence so many rapes etc that happen with the youngsters these days)
so, i dont think you have anything to worry about ...............except perhaps to worry about his drinking ??? and how you dealt with the situation
i think, if you were secure enough in yourself you would have walked over to him, put your hand round his waist and said something like " isnt he a silly sod ( to her ) , sorry hes bothering you.............come on, come back to your mates you dobate!!!"
LOL !!! honestly i really feel you are making too much of this !!! .................and i wonder why ???