I think its not a matter of how much he can give but rather in what way he can give it. There is a lot that people with SZ have difficulty with, but there are so many compensating factors which you'll have to find and appreciate.
My own gf definitely has her issues, some of them ranging far beyond SZ itself, but on the other hand she has a heart of the purest gold, the kind of which I have never before seen. And she has (no pun) a truly beautiful mind that is able to intuitively understand things I have taken years to figure out intellectually. And her artistic abilities are incredible, just like her almost limitless capacity for empathy.

SZ is not just a curse or just an illness. Its also the downside of having a wonderful extraordinary mind. I wish the world would understand and appreciate these people better. That would benefit all of us.