Guys, should I end the friendship if the thought of my guy friend turns me on?

He is aware that I have feelings for him. An opportunity for sex came up a few months ago, but I didn't take advantage of it because it'd be my first time and I wasn't sure of how he felt about me. We've never kissed or done anything more than hug, with the exception of cuddles one night when he proposed we have sex. I'm genuinely interested in him but since he hasn't acted on it my guess is that he doesn't feel the same way.

I care about him way too deeply to simply be friends and I can't stop fantasizing about him sexually, so I think it's best to walk away. Would that be a rational decision?
Guys, should I end the friendship if the thought of my guy friend turns me on?
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