I cut off a friend a few years ago who was toxic to themselves. He desperately wanted friendship, but it always felt like a forced friendship, not a natural one. They had drinking and social issues and I felt like more of a babysitter than a friend. Eventually I stopped communication and left him behind. Unfortunately he committed suicide last year as he had a mountain of issues that all became too much for him. I don't feel guilty over what happened as he was in too deep, and hadn't spoken to him in close to 5 years. I have learnt in life that I would rather have a handful of good friends, than bucket loads of 'meaningless friends'.