My sister died on 30th February 2023. I have to take a break from everything, although I might go back to the gym just to take my mind off it. She had a food addiction, she basically lived to eat, so she got heavier and fatter week by week until she was 162 kg at 1.65m tall. Her oxygen levels went as low as 60 or even in the 50s and she refused to go to the hospital (she went there a few times, the ambulance also gave her oxygen a few times).
We found her dead after Sunday's night, she died in her sleep. She was 48 years old. I sometimes think I might be going crazy, soon, although I'm trying to keep it together.
Oh man, Raptor, I'm so sorry. My heart goes out to you. It's horrible to lose a sibling, even when you can see it coming. I lost my brother in January 2018, after watching him struggle for years with addiction (drugs, in his case) and mental illness. IME, the grief never goes away but time does help it recede.