OP clearly its something you really need to tackle head on, it must be an awful situation (sadly I did something similar to my wife a number of years ago – whilst it still makes me angry that I treated her that way I was a bit lost and had other people blowing smoke up my arse and I turned into a right w@nker!).
I went quiet, avoided eye contact, all sorts of things. Whilst the exact details are irrelevant and I’m not going to start making assumptions what could be going on I would highly recommend getting some counselling.
Individually or together or both but I was highly sceptical but gave it a go and it really opened my eyes to a few things, mainly about my failings that I really wasn’t aware of.
Children rightly or wrongly can make things much harder but you need to make sure you are happy too.
I’ve not read all the replies so sorry if I repeated anything said above but I wish you all the best – positive thoughts buddy!