I just defined the equation for friendship

F = t^f

Let me explain , its simply friendship = time spent together^{how fun you are}

if you are some kind of asshole that is very irritating , your f in the equation can be defined as f ≦ 0.ur friendship is very little and basically none and vice versa

Basically , friendship is just like an investment. the more time u put in the stronger friendship u will get. if you invest none then u will gradually lose ur friends and eventually become acquaintance even if both used to be very close friends.

What do u get through this investment u might ask.Its the fun that you will get in return