I agree with hankster. I kind of think there must have been signs somewhere along the way that things were either "sticky" between you two or for him individually. What I mean is you know about his struggles and know about him seeing a counselor, can you think back to a time he may have started pulling away before this? Rarely do any breakups really come out of the blue like that. Maybe it will just take some self analysis on your part to figure it out.

That being said, it could easily just mean what he said - for whatever reasons, he needs the space. From what you've said there is no way to know the exact reasons but he did say he loves you and wants to meet you and talk. If it's an emotional breakdown, your best possible route would be to show your support simply by waiting for him. Try to be focused on his needs right now and how he may be going through a lot that he doesn't want you to have to deal with. Don't think so much about yourself* and how you are without him or what he's "done" to you by breaking up. Abuse of any kind makes it very hard to trust people and I emphasize that the best thing you can do is wait and be there for him when he's finished. His trust in you will grow from that, believe me.

*(not saying you're selfish per se, but we all tend to think about what is happening to us rather than the other person many times, it takes effort to refocus our thoughts on others)