One person can only take so much, take it from a person who is constantly told to leave, yet I stay. Im not saying you cannot save your relationship, I am just saying he is only doing what you have told him to do over and over and over each time breaking him down more and more until he got the courage to do it.

If he says he dose not have a problem, anyone with enough hate in them to send you pictures like that has a problem, I agree you both need to get into therapy, and its a good idea to get your son in as well.

You can work this out if you really want to , but you have to want to change and not push him away when you are upset, you are damaging him as well as yourself and son.

best luck ( dont mean to sound harsh )