That's some story and I'm so sorry that you're going through this. I am Catholic and this is at least the 3rd time that I have recently been told that a person who left the seminary has ended up at some point in full blown MLC. It must have something to do will feelings that they felt had been repressed.
You know, he can spin it anyway he likes as most of them do but it's still a pile of crap. This is not your fault. This is all on his shoulders. Do you have children?