Friend and Acquaintance

What's the different between friends and acquaintance?Can u tell me?On my opinion,acquaintance is just basicly called "hi and bye" friends who doesn't even care anything much about you..When an acquaintance pass by,they would just greet u,wouldn't even bother to ask how are u.Where as when a friends passes u,they would ask how well are you.A acquaintance is defined as a person one knows slightlywhere as friend is defined as a person whom one has a bond of mutual affection..Sure u can see a difference between both of them..Friends who really understands you is very hard to find..If u have one,u should not lose him/her..Friends who let u to spill over your problem,share your feeling,cheer u up when you are at the worst state,who believe u till the end no matter what,who see you as who you are not what you are and who is always there when u need them..Nw u know who your true friends are..So what are you to your friend?An aquaintance or a friend?IS he/she worthy a to be a friend?If u have a friend which u are not treating well then make up to him/her..What would u prefer?Friend or acquaintance?