You could be me a few years ago. Decided I'd had enough (won't bore you with reasons).
My ex also came across as if he accepted it but expected sex and for me to carry on doing all the housework, cooking, laundry and paying for everything.
I shared a bed with my youngest DC instead, cut up his credit cards and stopped cooking and doing laundry but still had to stay in house. After 4 months of this he still didn't want anyone to be told that we'd split up and went absolutely ballistic when I said I was meeting a male for coffee.
Anyway that was when I fully realised that I was always going to be stuck in the same situation. We agreed to shared childcare for the DC and I stayed in a friend's spare room and kids slept on floor when I had them.
I went to council and told them I was homeless and also to a solicitor to start separation proceedings.
Anyway long story short - I ended up with kids full time as he wasn't all that interested in them and they were a trump card for him to keep me in the house (in his mind). I was given emergency housing in a grotty area - but moved on since then.
My ex seemed to think it was a big joke - until I actually did something about it.
Be strong - it will get worse before it gets better - but it WILL get better!!