I hate to sound harsh but WHY would you set yourself up like this? It's not like you are married or are family members.

Get to Al-Anon as soon as you can. Seriously, you made a CONSCIOUS choice to be in a relationship with someone that is very sick and not going to get well on his own (or with you "helping").

It's only going to get worse and more painful. Is your life that dull? Are there things about yourself that you wish to change but focus on others' problems so you don't have to face your own.

Get out while you can. I've seen this type of situation before with friends and you are setting yourself up for failure.