Sounds like you don’t like her, at all! I’m not clear on why you haven’t initiated the divorce.
Is there any chance you’re irritated, snappy, not talking, not sharing a bed because you want her to take the first steps? Be honest here.
You mention you didn’t have a great childhood and are losing the ability to create a good environment. Well that’s what the kids are living with: a father who behaves terrible towards the mother, doesn’t want to be near her.
How do you feel about what this is doing to them, given you went through an awful childhood yourself?
They must be feeling very sorry for their mother? It’s not a good thing for a parent to put upon their kids, it’s horrible for them to watch.
So what’s the reason you haven’t already divorced? What you’re doing is currently cowardly, to all concerned. I’m sorry you went through that too, so it should have helped you be better towards all concerned.
Do you have a plan for the future, at all? What will your new living arrangements be, if you’ve planned that far ahead? What active and responsible steps will you take soon?
It’s probably a good thing to share with your family too, or friends. Pick a really good person you look up to who can help see things rationally. Someone who interacts with both of you regularly.
And don’t force yourself to love her. If it’s not there, she could be happy with someone to whom it comes naturally. That’s pretty fair. What do you think?