There are must some people you don't like. you don't accept that kind of personality. you don't agreen what they do. you will say that " I will never be a part of them." however, life is unexpected. for some reasons, you might be need that kind of person. when you get a little closer to them, you think  that "he is not that bad". and then you become friends unexpectedly. may be it tells us that what we think isn't always right. the way that we have been insisted isn't what we want.