We have friends, and then we have one friend who's the gold medalist of friends. You know, that one who walks into your house like they live there? The one you can call at any time of day or night and they'll be right there, no matter what?
Those kinds of friends are rare, and when you find one, you've gotta fight to keep them.
These BFF's didn't just go the extra mile—they went the whole damn marathon to prove just how loyal they are.