What do i do with my feelings

Hi, im an 18 yo guy, and I've had a crush on my friend since i met him 3 years ago, , quick recap he's been my friend we kinda drifted away for a while but now we're getting closer and closer,

Problem is, he's a really good friend and i really like him as a friend, but I've also had romantic feelings for him ever since i met him.

We've gotten closer this year since we share a class together again and my feelings for him have only grown more and more, to the point I can't stop thinking about how much I'd like to hold his hand, hug him, how good his perfume smells, how attractive the shape of his face is, how much i like him, and it hurts because I KNOW he's straight and I know he has a girlfriend and he's never shown signs of liking me the way i do, but I don't want to get away from him because he's so nice and such a good guy and i know he also appreciates me as a good friend because he seeks to spend time with me after class and chat during lunch etc.

I've already accepted the fact that I'll never even get to confess my feelings for him and i think im ok with that, i feel stupid for getting sad over this because it didn't even get to a proper fantasy, not only (but mainly) because he's straight, but also he's a bit older than i am and I don't want to ruin this friendship.

I've asked for advice for this several times but everyone always says "forget him" "move on" " cut him off" but i don't like any of those options, i feel like im stranded in a beautiful paradise island with no escape and all the delicious looking fruit is poisonous and All the beautiful flowers have thorns.

Also add to all this the fact that no other guy has ever shown attraction to me, I've only noticed one guy has but he's mentally unstable and not my type at all, AND im not very attractive at all. I mention all this because I've also been told "find other guys" but there are no other guys.

TLDR: classic I've got a crush on my straight good friend, but I don't want to end the friendship and he's also one of the few and rare good guys so i don't want to just get away from him so idk what to do.