What Are Friends For?

What are friends for?
If they only nagged at you everytime,
If they only talked to you just for knowing something,
If they only played with you to gain something,
If they only lied to you what they actually feel,
If they only asked your help but only to fulfill their selfishness,
If they only answered your question just because they want to get rid of you quickly,
If they only act good at you so that you can be used all the time,
What are friends for?