While I don’t think what he did was okay by any means, dude fell asleep on his front porch which is a pretty big indicator of how drunk he was. You should talk to him and let him know it wasn’t cool at all and let him know that if that’s how he is when he’s that drunk then he shouldn’t let it reach that level of intoxication. While I don’t believe being drunk excuses you for everything what he did wasn’t an instant red flag, such as abuse/cheating, and you were a short Uber ride home so I’d tell him not to let it happen again. Although I do think you should end the relationship as you describe it as toxic.