Speculating on why someone isn’t texting you back is kind of pointless, since they will never tell you the reason, or at least the real reason. And they don’t have to because the reason is the same %100 of the time. In the ranking of importance of things and people they are dealing with in their life from moment to moment, you are now off the list entirely. Your texts have been moved into the category of “Irrelevant”. I actually ran into a woman that I had been dating who ghosted me, and asked her what was going on. Her response was that it was summertime and she didn’t want to go outside. She might as well have said that she had been spirited away to Neptune by aliens. It no longer mattered anyway.