Beingme. I have to jump in here. Yes, yes yes. Sexual abuse, unacknowledged and undealt with has a huge effect on people.

The 'just wanting to forget' is classic. And at the same time his mother left. SO he was emotionally abandoned, by his mother and sexually abused by another adult. And his father continually emotionally abandoned his family by having affairs. His parents failed to protect him.

Seriously BM - run this by any therapist

I suspect that you filled the gap in his life for a long time - you are clearly an amazing person - and held him together, but only he can deal with his issues, which will be hugely painful.

I know we should take what we read on the net with a pinch of salt, but look up abuse. Sexual abuse also involves emotional abuse, by its very nature and it does terrible things to people. It can be dealt with.