Most Helpful Guy
He got what he wanted AND then probably GOT BORED OF YOU. Hell it could be a number of things like your lack of hobbies OR you personality ain't no telling but hey
Most Helpful Girl
Because guys are assholes.
I'm going to Give him the benefit of the doubt and say he's in his man world and maybe is thinking over how he feels about you and what can happen next.
Although he sounds like a typical douche who's got a nice girl crushing on him, you deserve better.
Did you say first time for you? And he just ignores you after? Ugh.
I might be overthinking and all he could be doing right now is "what beer should I drink?"