Would you stay or go if your partner became mentally ill?

I once dated a guy that was mentally ill. I didn't know it at first, but after spending time with him, and since he wasn't use to having a girlfriend, it became worse and obvious. It got so bad that I thought I was pregnant and he committed suicide. I like to think now, that if I could go through that, I can do just about anything. So, yes, I would stay.