I just... I don't know. I don't even know the questions to ask, here. I'm looking for any lifeline of someone who understands how confusing and devastating this all is.
Hello and welcome to the family. None of us knew what to ask when we first arrived because we were reeling, trying to understand, trying to figure out what we're doing in this type of relationship. I (and hundreds of others) can completely relate to the feelings you're feeling at the moment.
Telling you what to do is easier though.
But first, a question. Are you still living with him? Or if you did separate, how long ago was that?
Also, since you posted in the "detaching" forum, you'll receive advice on leaving the relationship. Is that what you want?
Right now, you and your child need time to heal. That may or may not be possible with you in the middle of it all right now. Rule #1 is that you must prioritize yourself because you have a young child to care for. That means detaching from his struggles and seeing this in a different light.
You take care of you. He takes care of him. Your mental health must come before his for multiple reasons. The main one is that helping him literally comes down to you being in the best possible emotional state.
Just know that you are not alone any more. We're here for you to vent to, ask questions, or anything in between.