Hi LaKasha, welcome to PC!
I don't really have the answers. But like what others have said, it is important for you to take care of yourself. No use taking of others when in the end you find yourself tired thereafter, right? I know this sounds harsh, but ultimately.. self-care is not equal to selfish. My T spent weeks ingraining that in me. I've been in the same shoes as you.. I had to take care of a friend who was threatening suicide everyday and it wore me out till I ended up in the hospital too.
The decision to seek help is ultimately up to himself. He can enact the change. Change won't happen if you drag him to help.. I believe that when a person wants to start treatment out of his own will, then recovery process could start.
Take care! If you think you need professional help yourself, go for it! You don't need to be 'mentally ill' per se to go talk to a professional
__________________
"The is no better exercise for the human heart than reaching and lifting others up." - John Holmes
herethennow: This ward is a prison!
Wardmate: No.. here's not a prison. *points to brain* Here is.
dx: recurrent MDD.