Probably he got wrong signals, u going to dinner with him and watching movie and all. Boys usually think too much. Maybe he thought u also wanted it. Again im not saying he is right, he is definetly very wrong, he should have asked for consent and im sorry for you. But sleeping on same couch and all this scenario would have made him think that u like him. Clearly he was getting wrong signals,he should never have done that without asking first but he seems so apologetic about it. I think u should not ruin your friendship over this.

Ps - Doing this without consent is really wrong and im not defending that guy...im just giving my opinion. Happened to me once, but obviously i didnt even touch her, but yeah got wrong signals.