It's a combination of several factors, your A, your upbringing and your ages. As a whole he's incredibly immature and at the time of your A, so were you.
To a certain degree, he's right in saying that your A was too much for him. However, because the two of you swept the problems under the rug, you never learned about the fallout that would occur. That's why I ALWAYS suggest C and never rug sweeping.
Right now, however, he's using your A as an excuse for blaming everything on you and his bad R choices.
Have you ever told him that you own up to your mistakes in the M and you are trying to fix what had happened, but it does not excuse his bad behavior and disrespect towards you?
If not, then you need to tell him. Then pack his things up and drop them off at the OW's home. Start living life to the fullest with your D's. They need you now more than your H.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.
