It's not wrong, just immature. You can't assume someone doesn't care just because they didn't reply. You really don't know what's going on in someone's life at every moment. If this is a true friend, and you are both on the same page, meaning, this friendship isn't only in your mind, then trust it...trust them by not placing all the credibility of the relationship into one phone call or text.
One thing to point out; when you give something to someone, do it unconditionally or don't do it at all because when you give and expect a payback, that's not really giving.