I am in complete agreement with Deb. I know you care about the man, Hannah sweetie, but in this behavior is manipulation and he is trying to control you with it. You need to stay strong and be resolved that you have to move on in your life, and he has to move on in his.
No matter what happens to him, it is NOT YOUR FAULT. He needs help, but professional help, not yours. You have to be strong. Stand by your decision, be supportive if you must, but move on.
I care about you, girl. I hope you don't hate me for these words. I was raised by an abusive man, and I know that they are not always in control of what they do. But you can take control of what YOU do.
You will survive this relationship, my friend. HUGS!!!