Friends play an important part in our lives.Some friendly relationships can be kept on argument and discussion,but it is usual for close friends to have similar ideas and beliefs,to have attitudes and interests in commen ---they often talk about "being on the same wavelength ".it generally takes time to reach this point.And the more intimately involved people become,the more they rely on one another .people want to do friends favours and hate to break a promise.Equally,friends have to learn to put up with annoying habits and try to tolerate differences of opinion