Sorry your world is spinning my dear. I think you'll at least find that a lot of people have asked the same questions as you and been in similar situations.
I think Lexi is right, stop and breath.
Focus on you for just a minute. Meditate on what your needs are. Think about what it will take to get them met and what you need to do to feel peace and happiness in your own life. Meditate on your boundaries and just how firm you are willing to be with them.Then...make a plan. Make some boundaries. Take actionable steps to get where you need to be.
Take the focus off of him and his issues.
I'd definitely go to an al-anon meeting soon if possible. And keep posting!