not sure where to go from here

[tiredndrained]

ok..the short version...my H closed his business a yr ago. Shortly after that he changed. Got a new job but was never home. Worked all night many days n I suspected he cheating. He grew angry n blamed me for everything. Told me I wasn't his wife anymore n was basically irrational. kids kept asking where he was..pretty much stopped coming home. Lost his new job in Aug. Things got worse. I got the ILYBNILWY speech. H almost never comes home n wont say where he is. Suddenly starts coming round just as I accidentally caught him. Dating OW for a yr. Started the week his business closed. She posted all their pics n dates on fb for the past year. He suddenly wants to work things out. I tell him i need time n finally start to come around when he becomes irrational n nasty n says i told people so its over bc i embarrassed him. still together in same house. I've backed off so we getting along. Not sure what to make of it. He swears over w OW but still goes out at night w no explanation. Won't tell me where he is n says its bc i bother him about it. all i ever do is ask. Do I ignore him n let him keep doing it? not sure where to go from here. i cry all the time..its affecting my job, my kids, everything. Im no longer crying in front of H.