This is a physical impossibility there is not enough time for the attention one must bestow on a hundred true friends and classical theories of friendship held that a man could only have a few. In earlier cultures people took friendship much more seriously and often ruminated deeply on the difference between real and apparent friendship.
True friendship has to simmer for a while.
People need to know each other very well before they know that they are close enough to sustain a meeting of souls. There is some warrant in the gospel for calling Jesus our friend, not because we have the right to do so but because Jesus tells us that he is willing to consider us so. When Jesus encourages us to consider him a friend, he is condescending to us. Obviously we are not equal to God, but the incarnate God nonetheless tells us that he is willing to overlook this disparity, as a sublime gift to us. To many people this is a very comforting idea, since it seems to bring Jesus down to our level, making our relationship with him cozy and familiar.