Originally Posted by
BBTaco 
I am having a hard time I guess because I feel like I've been watching him slowly commit suicide
This may well be true. You cannot save him - he must do this for himself - and you must be prepared for the ugly truth that you may get a call saying he is gone. Vomiting and shitting blood is very serious. He should go to the ER to be honest, and you can't make him that either.
Stay strong, don't blame yourself and post back if we can help.