Everyone can decide who is a friend for them and who is not. If someone is not your friend but not a foe either, they can be an acquaintance. It depends on the depth of your relationship with the other. Acquaintances are those people, who you see and talk to almost every day, nevertheless, your relationship is not that intimate and deep. That is, the relationship with acquaintances is rather superficial. Also, friends and acquaintances have different level of interest. Moreover, the quality of time spent with others can define who is a friend and who is just an acquaintance. Finally, friends are always there for you and you can count on them whatever happens, and they do not require you to do a favor for them once they did one to you.
