Is he using me or did i do the right thing?

Stay away from him he is trouble. He obviously didnt make u feel too good when he ually aulted u cos believe me thats wot it was which is why he got a punch. You need to work on ur self esteem before u get with anybody or u will end up with creeps like him. Wouldnt you much rather go with someone drug free who respects you? Its up to u at the end of the day but i would run a mile and hold out for someone decent.