Angel Bunny is tired of all the attention Fluttershy gives him. Angel likes attention, sure, but when it's so much attention that he gets no time to himself, he doesn't seem to want any more of Fluttershy's love.
He does what any sane person would do, and tries to get her in a relationship with the first pony he sees so as to get Fluttershy to leave him alone more often and to hopefully get Fluttershy somepony ELSE to love. He picks the first pony he sees, and that pony is Rainbow Dash.
This is an extremely old story that I never released. Dalek Saxon helped a lot in the creation of it. Hope you enjoy. I don't think I'll be writing too much more Flutterdash-esque stories from now on, since I've got other things I'd like to write.