I agree with Remus that you can be frank about your feelings and talk to him about it
but at the same time I'm afraid that it might be too soon for you to jump into a relationship when you've just came out of a toxic one
if I was in your possition I wouldn't wanna be with anyone at the moment
try to solve the feelings you'll probably get later and start fresh after a few months, or a year if needed
I honestly think being single for a while is the best and healthiest option after any relationship