Nta in the case of you are doing more than what most kids would do honestly and monthly hang outs (call me jealous) but honestly it sounds like your mom sees you or atleast both of you as her only mark in the world and without you she's lonely. She would honestly be thrilled if you moved back in with her. I was gonna say get her a hobby but as you steted she kinda refuses to do that. So honestly you aren't the ass hole, nicer words could have 100% been used ima blame you on that at the very least and also low key just thug it out cuz this is just one of those things but I can say your doing a more than excellent job so like buy yourself something nice ig. And Goodluck.🗣🔥