If he didnt like me why didnt he just say so?

If i were you, i just wouldnt worry about it! If he doesn't like you then he will find a way to tell you. Sooner or later, he wont just keep you going and keep you thinking that he likes you. Just give it time! And trust him that he didnt do anything at the party! Trust is the biggest element and unless he has done something break your trust, then just dont worry!! hope this helps!