You look at her, and for a moment you wonder if you should do something more, explore the options of your relationship. Hanging out with Dash is the best. You two have so much fun, you're very close.
But if you asked her out on a date, that could change. Your relationship, everything, it would change.
You didn't want to risk losing your best friend, you didn't want to change what you have. So you smile at her, raising your hoof for her to bump. "Friends."
She looks at the hoof for a moment, then back at you with a small smile. "Yeah, friends."
You left the café feeling like your friendship with Rainbow Dash had grown stronger. You two have been friends for such a long time, you trust one another, and this experience has just proved to you both how much you trust each other, and your friendship will only grow stronger from here on out.
Friends.
The End!