This is just a quick drabble, I might continue it if people like it, so let me now if you do.
There are the brown eyes.
And then there are the blue ones.
The brown ones are soft, and comforting, and so, so safe.
The blue ones are blown wide by lust, and dotted with golden flecks, and so, so seductive.
When Kurt looks into the mirror, he can see his own eyes, which are like a blue/green/gray/brown and he realizes how much his eyes are like him. They will never be able to decide, to choose between the colourful blue, and the sensitive brown.
But Kurt has to decide, sooner or later. He can't keep hating himself, and loving Blaine, and loving Sebastian, he just can't. He knows he can't, but he lets himself love, and be loved by them both.
Sometimes, when it's late at night, Kurt lies in his bed, and he thinks to himself about where it all went wrong, when it all went to hell, the minute he fell in love, just a little bit, with the boy who wasn't his boyfriend.