He has a dark past.
When he returned home, he saw the affair site of his wife.
His wife had been having sex.
He caused the suicide attempt.
Since then, he has a mental disorder.
His strange behavior is caused by psychosis.
He was said to have seen a lot of nasty photo of you and your boyfriend.
He has relapsed psychosis.
Late last year, he caused a suicide attempt.
I do not want to see him suffer.
So, I persuaded to him to break up with you.
I'm really sorry.