Suggest me a book about living alone with some comedy and peace

i have recently developed separation anxiety from my partner who is always thinking of leaving me due to stress and depression, currently i am helping them as much as i can, i helped them get a good job at the same place i work at and i am training them, Walmart bakery/deli associate which is the easiest job either of us has ever had and they want to open their own bakery in the future but due to now being around them a lot and their depression and bipolar disorder i have developed a abandonment anxiety

i know i should talk to someone about it and i am but i wasnt a book that eases the anxiety of the heavy heart of fear and want a book with some humor and the person not needing to rely on anyone and being content and happy with their life, it can have any theme like mystery murder as a detective, or a medieval dnd fantasy but i dont want any love or the main or anyone if possible relying on someone else

Sorry if this is too much but chat gbt isn't helping me and i dont read too many books, i know having space from them and my own hobbies will work the best but i just want a book right now, also a tv show or movies will help too i think so feel free to recommend anything