what should we consider while choosing a new friend

Well I never choose my friend it's all a matter of coincidence, for examples in a classroom. Were all new faces in the rooms and almost every ones have talk to their seat mates as i look around I saw, in a corner this girl is silent and shy. I come up to here then smile, talk for awhile and introduce each other name. The next day, were both seated near each other and she want me to be her companion wherever she goes. Like during recess, she treat me or else we buy the same snacks. it seem that my likes is also her likes. Then, I ask her that I approach her and the first ones who befriend her. It's so simple you just smile and be comfortable to approach a new person who looks the same with me simple, kind and somehow shy. I think it is the qualities that attracts to me some mystery in the personality of the person interest me more that I make a conversation..

first of all I see the nature of the person and the good qualities of him so that i can make friendship with him. looks have no importance for me as i think that these people have ego for being beautiful and do not give importance to others who are less in comparision to them. I want my friend to be helpful to me at all times and lastly should come in need when i want them to be near.