Something happened that night - Starchaser

Regulus Black's life is full of shit. Really that's it. A shitty boy with shitty parents who found solace in scrawled vents, smudged by tears, yet curved with wit. A boy who is constantly reminded of what he cannot have and what he could not keep. A star, in a galaxy that outshines him.

James Potter was 11, saw a pretty girl with green eyes and thought he could pledge his allegiance to her and she would fall in love with him easily, but she didn't. And that's that. Until he realises that its not in fact 'normal' to kind-of-fancy his best friends brother and suddenly this weird kitten is following him around at night.

or

James Fleamont Potter only liked the idea of Lily and not really so much her and Regulus Black is a hopeless romantic for the one boy who he cant have.