I hear the comments here, and understand them. Yes, protect yourself and make sure you are healthy. I also offer compassion as an ingredient. You are working on your relationship, yourself, he is working on himself, and this is of course a process.
Yes, it certainly might be manipulation or something of the like. It might also be vulnerability, and his own demons taking over. If it's isolated, or leads to him being better, open (truly open) and he's getting better, etc. -- then see where it goes.
Be very careful where this goes. If it's the first step in a pattern, then yes, treat it as such.