I can't find a good a reason not to hate this person, but I just can't develop hatred towards him

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This person is a friend of mine. He is ever in wrong places at the worst moment. He lies a lot and amazingly, he is as genuine as how a friend should be in deeds. At one time, we were young and adventurous, we could do stuff and go scot free just because someone stood there for us when we ran into a deep mess. In my mind, I though his younger blood was driving him to be that careless. But as time went by, I changed into a cool guy but he never showed a slight change in him. He still pulls off funny, annoying stuff and expects me to back up his wrong doings. I have talked to him several times to make him change his ways but I guess his mind just can't comprehend admonitions that bring him 'fun'. Guess what! I have to be three for him or he might not live long enough to see tomorrow. In other terms 'a danger to himself'. Now you see my dilemma? I need a reason to end our friendship... but I am afraid he might get hurt and for sure, I can't stand that. What next? Have your say!