You are worth it
You have been living with an active addict for 15 years. According to your posts, he has been saying he's dying for at least the past 5 years. Yet, he's still here doing what drug addicts do.
He has not taken any responsibility for himself or his medical condition. You are not responsible for him.
He's blows his $900 disability check in 5 days, on crack. You are in debt because you have been paying his living expenses, enabling him.
It sickens me to read he's throwing you the line that he's wasted 16 years of his life and all that. What a double load of carp.
A fraction of the money you are spending on enabling him could buy some seriously good therapy for yourself. You cannot save him, from himself. You can however, save yourself and you are worth it. Please cut this manipulative, drug addicted leach off, go home and reclaim your life. You are worth it.