1 year separation

Has anyone ever been separated from their partner for a set amount of time and were able to start afresh. My husband has cheated on me twice once with a girl for 2 years 9 months they would video call n send sex pics, once a one night stand then he was talking to some girls. In this time we have a 3 year old n im currently pregnant. I just need a break a complete break with no communication so i can see what i want. Everyone in my family has been been cheated on n he knows how i feel about it. He says he can not communicate with me but i ask him how he can communicate with these other women and all it takes to cheat. He wants to ignore it like its its nothing major just sex.

Should we separate or just divorce. I feel for my babies coz id be moving countries n he would not see them daily n i wouldn't go out my way to find him to communicate i just want a break