Well - I know how difficult this must be. Truly.
It is soo painful to hear that someone you love is having a hard time, and especially to hear they are suicidal.
I really wish you the best - I felt the same way you do, and just like when I was going thru this, I can't really say more about what to do in your situation.
If you ever need to talk personally, PM me, I'd be happy to lend an ear at the least.