Tired of friend with issues - feel guilty

I have a friend that lives out of state that I helped emotionally and financially for a number of years. When his life seemed to get better, he pretty much didn't have time for me anymore and had a smart ass mouth on him most of the time. Then when life started going south for him again, he would call me and cry to me and I would be there for him. After 10+ years of this off and on, I am tired of it. I don't want to hear about all his problems (usually same $#@! different day stuff). I feel like he used me and another woman in his life and now she's kicking him out and he's all depressed and doesn't know what to do. Part of me wants to be there for him again, but another part of me says Why bother. I am really torn. I feel like he's been lying for years about things and he swears he hasn't but gut tells me he only says things when he wants something. He called me a little while ago telling me that no one cares about him anymore and he needs to find a place to live right away and is so depressed. Should I just tell him to leave me alone or be a good friend and listen? I feel like he sucks the life force out of me, so my head tells me to get away fast, but my heart breaks and says don't give up on him when everyone else has.

My son was hooked on drugs and I had to do the tough love things. Many nights I would cry for that tough love. been a single parent and a man with 2 boys it was hard. he would go to jail and family would bail him out. with that said it hurt him didn't help him because he knew there was help there so it just pulled him under. after I had a talk with my family to let him be if forced him to do better. if help would have still been there for him he would have ended up dead or in locked up. sometime you can help people because you have a good heart and not known it can hurt them. Let this guy grow up. You have your own problems you don't need his also. to you both a favor..take care and think about this. it's your money he want not you. its a drug with in him.