here's my tuppence worth,
It sounds to me as if this guy tried to take advantage of you while you were incapacitated through drink.
When you say he dragged you outside and kissed you, this could be seen as sexual assault, which is an offence, especially if you had already made it clear to him that his advances were unwelcome. also, if you do not remember any of this, what is to say that he, or someone else didn't slip you some Rohypnal or Hypnoval (date rape drugs)while you were not looking?