First, remember you are not alone.
Second, you WILL get through this.
...and the rest is practical advice.
Talk to your doctor and explain your dilemma. He may be able to order home healthcare for you, which would mean an aide could visit you and help you with your physical needs.
Can you move in with a friend or family member? Having him as your only emotional support is not good for you, obviously.
I was married over 20 years. The divorce happened 10 years ago. I did get past it, and you will too! It wasn't easy but few things worth pursuing are easy.