If you're looking for a cute, scary, or matching best-friend Halloween costume, we've got you covered — here are the easiest best-friend costume ideas.

Get In Line T-Shirt, $48, Nylon Ensure the whole world knows you've already claimed her as your Valentine. 14. A Card To Which She Must RSVP "Yes" Friend Valentine's Day Card, $5, Etsy ...

You're guaranteed to make your bestie LOL by sharing any of these cute, funny best friend quotes. Plus, they make for perfect short and sweet Instagram captions.