Trusting,

Your EX getting treatment is wonderful news. Sounds as though that maybe the treatment is starting to take affect. I have to wonder if realizing that part of the reason he was feeling and doing as he has propelled him to get checked out?

I truly believe my H has low T levels, too. Has all the symptoms in spades. In fact I think he knows it too, but is not willing to do anything about getting it checked out. Maybe he has gotten comfortable being miserable?

I don't think that hormones are the sole cause of MLC, but I believe them being messed up could sure add to a crisis in progress.

I think you're handling everything just fine. Just keep expectation at zero and protect yourself from getting sucked in. You'll know for sure when he emerges.