What does it mean when someone contacted you after almost a year?

Let’s say supposedly we liked each other in the past, but things ended badly. He came back sayin it might be pathetic of him to contact me after a long time and maybe I don’t care anymore, but he wishes me well overall basically.

is it possible he cares, felt guilty in the past, or just needed attention because he might not be dating anymore?

do I wanna rekindle things? Nah. I’m just curious on how to receive it and how I should respond as a good person or not respond at all to leave the past alone.

Updates
+1 y
Oops I’m looking at the dates. It has been more than a year since I last heard from him…
What does it mean when someone contacted you after almost a year?
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