My wife of 25 years who has ADHD does not respond to 95% of the texts I send her despite having promised to at least respond with a ‘k’ to acknowledge she’s seen the text. We’ve discussed it several times over the years but nothing has ever changed. She also refuses to actually listen to any messages left on her voicemail; she’ll call back (sometimes) instead. My point here is that ADHD symptoms can result in not returning texts. I don’t have a working solution.