cheat

ok ladies my husband always use to cheat when we were dating then august of 2017 he cheated with a mutual friend i dont feel happy anymore i still feel just like packing my shit and leaving we have been together 6 years married for 3 years this march what should I do p.s he turned my whole family against me even made me go to the doc cause he was saying im crazy just like my father but then got the proof of his cheating and to this day I still dont have all the answers i think they slept together but they both denied it but he was out one night after work only got home 3 am in the morning what to do ??

this is him with the slag at work and a love letter when he changed jobs