Firstly of all, trust in between two old friends is more strong compared to a recently developed friendship. Due to this it becomes easier to share our problems and feelings with them. An old friend knows you and understands you better than a new friend. For example, whenever I feel like sharing my problems and need help for emergency, I usually seek help from my old friends as I am confident that my problems will be solved. Many a times when we are in short of money, we usually take refuge in our old friends comfort rather than asking it from our new friends due to lack of faith that help will be provided.
Secondly, old friends know your strengths and weakness and can guide you better. New friendship takes time to develop as each partner is not completely aware of other partner's like and dislikes. With old friends we have already pass this stage and they know how you will behave in a particular situation in advance. Hence an old friend can give you a clear picture of what is good and bad for you. For example, when I was not sure which particular field to go after my high school, she suggested me that I should take up engineering as my problem solving skill is good. Today I can proudly say that I am a successful engineer and the credit for this goes to my friend who guided me well.
However, many times we are not able to keep contact with our old friends due to hectic life and other personal problems. A human being always needs someone with who can share feelings. Hence we usually try to make new friends to keep our social network strong so that help is available immediately when needed. But friendships which are meant for mutual benefits do