Hi 32, Welcome to Healing Well forum we are happy to have you. I totally agree with hopeful here. My ex-husband didnt use drugs but he did very much have a problem moving on from his past marrriage. They were together for 2 years and had 2 children together (girls) which his parents are raising. My ex and I were together for 11 years. I wish he would of agreed to go to counseling with me or anything at all...but it seemed that everything bad his ex did he thought I would do. Still to this day he cant move on from our relationship...we have been divorced for 2 years and he e-mails me almost daily.
I know it isnt the same situation but you do need to get him into a counselor to help him move on from that relationship and hopefully not depend on the chemical substances to get him though the day. All the best wishes to you and your family. Take care