I've been where you are. Follow your instinct. Over the long run, it's better to end the relationship. Believe me. I know.

I would say fear of the unknown can be main factor, not having a place to stay long term his threats to you being with someone else. Thing is you have to do what brings you happiness and joy and don't let anyone take that from you.

When I read your post I was reading my own story! I’ve been married for 35 years and feel exactly the same easy but I feel if I asked for a divorce my kids would hate me. What to do???

Very True, and he wants to stay married...but I just don't see enough effort to stay

Perhaps it is hard to leave a situation that is bad because we do not know what comes after leaving?