There are two kinds of friendship: the beneficial friendship and the erroneous friendship. The erroneous friendship balances on the principle of "the closer we are, the more okay it is for me to say anything I want to you and for me to treat you any way that I want to, and for me to disrespect you and take advantage of you" while a true friendship is rooted in this principle: "the closer we are, the more respect I have for you, the better I will treat you, the higher I will regard you, the more good things I will wish for you." You will know someone is a true friend by basis of observing their actions towards you as the friendship grows deeper. A true friend will continue to hold you in higher and higher regard while the error of a friend will see your goodwill and newfound fondness as basis to do and say whatever he/she wants, that is disrespectful and non-beneficial to you.
I really like the thing called friendship. And I think the most fulfilling kind of friendship is the one that you stumble quite randomly upon. Unexpected and unknown. You can learn a lot about yourself from these kinds of friendships, and some last a long time while others last only for the duration of time that you have together! But then I wonder, is the length of a friendship measured by the time you are given to spend within each others' company? Or is it measured by how long into the future you can look back at the photos you took, look back and replay the adventures and the laughter in your head; still feeling like it was one of the "bestest" times of your life? Because if it's the latter, I have a thousand friends!