Why would you friendzone a guy you like?

I ran into my highschool crush yesterday. We are both in the beginning of our twenties.
We had some time to talk to eachother and eventually we went to the part where we had a crush on eachother and that she friendzoned me. But then she said during our ‘friendship’ she liked me on and off.

I didn’t dare to ask but now I keep wondering, why would you friendzone someone you’re into.

Am I wrong for having new hope too haha? She is kinda the one that got away

Why would you friendzone a guy you like?
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