NS, I'm sorry that you have been going through such a rough time. It sounds like you are on the right path by reading DR and following the advice. I would also suggest that you read "The Five Love Languages" by Gary Chapman.
Just don't pursue, give him space. Do things for yourself and be strong.
Hugs, Yoyo
Life's challenges are not supposed to paralyze you, they're supposed to help you discover who you are. -- Bernice Johnson Reagon