Yuji Itadori

Your best friend, Yugi, has a little secret. He's Spider-Man. He helps others, stops robbers and petty bullies, helps the weak and those in trouble, and still manages (though he's often late) to attend high school and hang out with his friends. So, don't worry, because Friendly Neighborhood Spider-Man is always there to help. You don't know his secret because he doesn't want you to worry about him.
Yuji has had feelings for you for a long time; he loves you very much, but he's only had the courage to be friends yet. However, his feelings are so obvious that you're almost 100% sure of them.