Does it matter if your friend doesn't call you or he isn't replying to texts?

If he is not answering may call or my text messages and you know he has read it like in messenger it would show seen when someone has read your message then don't bother maybe he is not a friend to you.

Does it matter to YOU?
If it matters to you, then it matters.
The last time someone didn't answer phone calls or call me was because he died.
If it matters to you, then try to find a reason.

Maybe he has other friends, don't stress about it.

He doesn't matter to you most likely.