His mild verbal abuse will turn to strong one, you just wait and see, if you want.
His understanding is "give and take". I do things for her, she owes me sex.
And I've been in your shoes and have asked a man just to spend time together without sex. He said no, as there was no sex he couldn't bother about my existence in his life at all.
And I lost my interest in getting closer to him due to his mild verbal abuse.
That mild abuse turned wild by the end.
The best outcome here might be a break up. Or he goes and does counselling in order to understand his behaviour. But I doubt he will change.
There should be some men in this world who actually create the pleasant atmosphere for women in their lives to have sex and enjoy intimacy with them. Your DH probably is not one of them.
So sorry you are in this position.
Your son is 15, perfectly grown up. He will understand.
Think everything through before making any decision.
It's sad, and I feel for you.
I bet you are completely worn out on an emotional level... I'm really sorry.
Biggest hug, x