Unrequited like in the animal kingdom.

He's Just Not That Into You — The Bird Edition

You know that feeling when—for reasons that you can't even fully articulate—you want so badly to make friends with someone? No matter what you do, how you flap your wings or gnaw on their ears with your razor sharp beak, you just can't get them to bounce back a little of the camaraderie you're sending out. These birds know what I'm talking about:

Sources: Huffington Post