You feel sorry for him because you love him?
You feel obligated to him because you love him?
You feel guilty because you love him?
I still love my xah. If he would of given me a chance, I would of tried to make it work. We were married and had a child together. We were together for 16 years. What I didn't realize then, but realize now, is there is no relationship with an active addict. None. It just can't happen. At least not a healthy one.
I let go. The pain got less in less. The love changed into something else.
I am happy now. It can happen.
I could only get to this point with no contact, or minimal contact.
Love gets you nowhere. Your feelings are valid. There is only so much you can take on the addict coaster. Maybe it is time you get off and work on you. You need to heal. You need healthy.
I would go no contact if possible.
Good luck.