Divorce and Children

this whole thing started about 2 yrs ago in july i went out of town with my son to house sit for a friend for ten days when my exhusband slept with someone while i was gone and then continued to see her after i got back and all that drama i found out bcuz he was stupid found out he was thinking about leaving me and all that crap our son was 6 months old it was bullcrap we seperated for a week and then i went right back to him stubborn that my marriage wasnt going to fall apart only it did piece by piece for a yr we fought all the time my son felt the tension and was more quite and reserved it was awful i finally left in july of last yr and thats when i decided we where done i couldnt do it anymore i was pregnant with our second child he hasnt seen his children in almost 4 months and counting but wont talk to me either