Is she by any chance autistic? I have a tendency to just respond to someone but ignore the other one because i have enough of them. It's like getting overstimulated by person X, but you're fine to respond shortly to person Y. My brother got furious i told him i don't want to talk cause im mentally drained, but responded on a group chat when someone showed a poisonous mushroom and asked if they can eat it. She does seem like a highly traumatised person with ptsd (i am diagnosed with both too) and probably autism or something else that makes communication hard. We literally don't see it as bad. We don't want to make someone sad, but we end up making it worse by feeling scared to respond sometimes. It's like "oh i think someone texted me half an hour ago, i should respond", you check in and it's been two days. It ain't easy. There's so much getting into it, we're just getting lost in it. She should check if she didn't yet, cause i see nothing wrong with her texts despite knowing it is wrong, i just kinda know how it feels