I have my fair share of dysfunctions. I've gotten better over the years, mainly in ways where I did not want to be an a-hole and realized I was being an a-hole in some ways.

But taking an honest trip back in time here, if someone does not wish to speak to you anymore, they will tell you. They will communicate it in some form. If someone needs to do something like change their email address, they will give you a heads up, like they do for everyone else on their contacts list (minus our hypothetical stalker character).

But when someone just ignores your emails and texts, it means that for whatever reason out of multiple possibilities, they don't want to talk to you, but they do want to keep seeing proof that you value them / miss them / consider them worth throwing your dignity away for / etc. It's very selfish and rude behavior, even if the person doing it doesn't see it that way yet. They might someday, I eventually realized I was being a selfish arse, but until / if that happens, you deserve better.