Reliving the past is all part of MLC. He's projecting on to you what the girlfriend did to him. Being tire, sad and depressed is all part of the MLC. Depression is the main ingredient and will be w/him for a long time. What he is doing is very, very normal for someone in crisis. He's scared of growing old and want that one chance to go back in time to see what happened. He was stunted emotionally as a child and yes, it sounds like his father did a number on him. He has to go back to that time and figure things out and accept that there was nothing he could do about it and then start to grow up.
It's not YOU...it's all about HIM and his childhood issues.
Of course, the more you go NC, the more he's going to contact you. It's the distance/pursuit game. Also, in his own way, he doesn't want to cut the tie w/you. Try to remember, you didn't break him, therefore you can't fix him.
Keep the focus on you because if you try to analyze his every word or action, it will drive you nuts. Emotions have a way of taking over for them and when they are emotionally, rational thinking goes out the window.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
