This isn't actually about me.

It's about my ex-boyfriend. He is a junior in high school, upper middle class, white, and he has depression. He also has ADHD (as do I, actually) and is attending a private school geared for students with these kinds of learning disabilities.
We're in quite a bit of a rut in terms of our relationship, and I don't believe that can be salvaged. I made a mistake that I imagine is pretty common. I thought that if I loved him enough, he'd love himself. But anyways, we've just broken up again and have been fighting pretty heatedly over email for about two weeks.
Today he wrote me a poem telling me how worthless and helpless and hopeless he felt. It also said he did not want to tell his family any more about it because he didn't want to hurt them anymore, and that I should not bother trying to help him.
I'm going to get in touch with his mom Thursday (I'm flying home from college tomorrow.) He has quite a bit of history...
I'm just wondering...I know I didn't go too in depth about who he is and whatnot, but is there anything I can tell him in the meantime that won't sound completely trite?
TIA.