I'm a man who struggles with dating, and my female friends always tell me "just be confident! Girls like confidence."

But I don't really know what that means. I can confidently do some things like change a bike tire (since I've been riding bikes my whole life), but I don't know what being confident means.

Can someone here help me understand?

One person said "being sure of yourself," but truth be told, there's plenty of things I am unsure of with myself. I'm constantly changing as a person, and often times I truly don't know what I'm doing.