When I went through my first divorce in 1993 my husband was behaving much like you very angry and bitter. Your son is stuck between you and your wife. He loves you both and probably feels torn in two. He has no other siblings to share the burden. He wants you both to be happy. He will feel guilty showing he is happy to see his Mom around you and visa versa.
Your son is crying out right now. He needs the grown ups in his life to grow up. When my youngest daughter was 14 she was diagnosed with cancer Ewing sarcoma. My ex husband and I came together as her parents. We let go of all the issues between us and we were there for our daughter night and day 24/7 for over a year. Thank God she is a Cancer survivor and now 25 yrs old.
I know you are hurting and putting up an angry front. Go for a run, buy a punching bag, anything to get the anger out in a healthy way. It's poison. Your son only has one childhood. You only have one life. I work in a hospital and I help many breath their last breath. We get to wake up tomorrow. Be thankful. Peace to you.
Me 52 H 44 T9 M 5 BD 12/11 H split 8/12 OW moved in 12/12 OW gone for good 6/14 We get closer again 9/14 SD 13 Me 4 Grown
Accept what is...let go of what was and have faith in what will be.