i need advice

so my husband and i have been married 4 yrs and have two kids together and our relationship hasnt always been great we have both done things behind each others back prior to getting married so u can imagine the trust issues we had/have last year we decided having social media was what was the issue due to lack of trust we always felt each other was up to something.. so we delete all socials for the past year. well yesterday our little one had his phone and swiped to the side and on iphone u can see his frequently used apps so i saw facebook and snapchat and i confronted him about it and he said he had it only bc he thought i had mine so thats why he downloaded it.. i told him i didnt have it and havent had it. so idk what to do now. (back when we did have it he had me blocked on everything) i have caught him insinuating he was a single man and have ppl screenshot him giving out his snapchat to girls on fb . so ladies what would yall do

ALSO we do live together so if i decide i dont want to be married to him anymore ik to file for divorce.. but before that idk how i would get him to leave the apartment he isnt on the lease but we are married. and he hasnt really left the apartment in the past week because he quit his job last week we share a car that is also mine.