The best relationship:

is when you two can act like lovers and bestfriends.
it's when you have more playful moments than serious ones.
it's when you can joke around, have unexpected hugs and kisses.
it's when you two give each other that specific stare and smile.
it's when you'll rather chill inside to watch movies, eat junk food and cuddle than go out all the time.
it's when you stay up all night just to settle your arguments and problems.

more than this, it's when you do Nothing than be yourself and someone still love you for who you are.

Isn't it? ;)