Accept or Change?~

As human we cant be perfect, no matter how hard we try, there is still things we cant do. Same goes to we cant demand everyone to have your way. In our daily social life, from times to times, people do will have somethings that against us, and this cant be avoid. All we can do is accept the way they are or change the person. Well, accept sound more easy than changing the person but what if the person holding some really bad attitude, we just accept just like that, the person will end up still doing the same thing or even get worst. Changing the person require a lot of patient and skills, sometimes even deep understanding of that person. In my idea, this is a rather difficult and risky process, some minor error will lead to the end of a friendship. Therefore, some people rather remain quite just to make their friendship longer. But I wonder, that is friendship worthy since one party is suffering because of another party without him/her concern?