First off, I hope you’re feeling better, or will be soon!
I’m inclined to think you need to be very careful here. Obviously it’s your choice, but you should remember how he treated you when you were together and really ask yourself if he would do better given a second chance? Will he do the therapy and, most importantly, commit to being a better person? Is it really you he misses, or what you could provide for him in the marriage? Just things to keep in mind.