All I can say is you need to change the way you think. Why on earth would you want him back after behaving like this toward you? Call him out on it.
My husband is like this, and I have detached and largely leave him to his own devices as far as I can manage. As long as he doesn’t affect the kids. He is now waiting for rehab. He regularly spends nearly 80% of his wages in 3 days so I have learnt not to rely on him in any way. Or lend him my car, or get any financial mess with him. I’m really sorry but I’m starting to hate him for what he is doing to our family. To the pint where I would suggest you just leave and don’t look back. If you do, you will thank me in a few months. I’ve had 14 years of this and I wouldn’t wish it on anyone.
Take it as an escape route. Honestly. And just get out while you can. They are life leeches, they will suck anything of any good out of you and then they will leave your shell behind.