I sent a farewell message to the person I like, and he didn't return my messages or call me back. Should I not contact him in the future? He doesn't want to.

I think maybe he doesn't know how to reply.

Imagine that he received a confession message, but he doesn't know you yet. He will feel suddenly and need time to adapt.

He can't promise you as soon as he receives your message. Unprepared, feelings are no joke.

Sometimes, so do i. When I received a text message that was difficult to answer, I simply didn't answer it.