Love Unrequited

"But she's being so difficult!"

- The Beast upsetting that Belle refused to join him for dinner

This is the state in which nobody seems to be allowed to reciprocate any romantic interest shown in them; since having some sort of love interest is standard for main characters in particular, this inevitably leads down the path of the Love Dodecahedron.

Often, a story will begin with this trope. Also, as the series ends, all bets are off and there might be some resolution by getting to know each other or become friends before their friendship become romance

When fans support relationships that involve unrequited love, you're looking at Starboarding. This might be resolved—or, alternately, made even more awkward—if the unrequited makes their feelings known.

If all the unrequited love is directed at the same character, they just might be a Mary Sue. The Ignored Enamored Underling may be working under someone Oblivious to Love. Any Love Triangle falls into this category.

Reason Why

 * they don't get along because of their selfless, etc.
 * hate each other which they argue and stuff
 * trying their best to show their love interest that they still care, but the love interest refuse to admit or don't care by thinking that they're using them, etc.