other half doesnt care

i wrote a lost the other day regarding our noght out but yesterday he had a work meeting said he was going there them home to his mums but he ended up going out i was worried sick and so was his mum ! at 3 he finially went on his fb and saw my message but didnt bother replying he finially replyed with im fine but dont talk to me ! wtf then this morning he wrote a message saying haha im sorry but were done ! i know for a fact what he was doing last night when he was out but how dare he speak to me like that i was worried actaully caring for him n he just wants to be rude about everything i know i orobably should just end things he can be mentally and physically abusive but hes all iv know for 4 years and i dont feel worthy of anything wee have a son so i cant cut off all ties i just dont know how to get over it