Why have I been struggling to give up hope on getting out of the friend-zone with this guy?

I have been friends with him over 3 years and he knows I like him. Yet he's never been interested in me. He's not even single anymore.

I know, this is a me problem. Does anyone know how to deal with this? (How to give up completely.) Because I want to give yet I am not sure how.

Any advice would be appreciated. Thanks.

Why have I been struggling to give up hope on getting out of the friend-zone with this guy?
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