Yes they do, and getting a good friend is really a boon. We very often are surrounded by like minded people. Think of your 4/5 closest friends. Why they are close as because they share common like's and dislikes. There are many instances where friends help you to shape your life.
But one thing to be taken care of when choosing a friend. Not everybody can become your friend. First of all you have to mix with him/her and then accept/reject as a friend. A friend is a true friend who helps you i your hard days- who guides you through your trouble and last but not the least be with you all the time.