Not everyone you like will want to be close friends. That isn’t a ruling on your worth. It’s just fit.

Liking someone does not oblige them to become close to you, and their not reciprocating is rarely about your value. People have limited room, existing histories, and their own idea of what a close friend is. Fit is a real thing, it is not distributed by merit, and often there is no reason you could fix even if you were told it.

Let the ones who are slow to come closer stay where they are, without a verdict attached. Keep being friendly. Spend the bulk of your effort on the people who are reaching back, because that is where it actually grows.