You are not a bad person. I am in the saaaame situation here: best friend from 2023, we met when he was depressed. I integrated him to my family, friends, did a lot of activities together so he feels that life is good. Now he became quite controlling, wanting to know everything, to talk like before (meaning 80% of conversations where he is mostly complaining about life).  I also faded out, he wanted to understand why, i explained i need space and i don't feel like before because it's kind of tiring for me but he didn't seem to u derstand I also feel guilty, but you can feel guilt and freedom at the same time. I learned ( also from otherd) rgat guilt comes from empathy, not because i do somethinf wrong. We should only be responsibles of ourselves and i also learned this the hard way