Is it more important to keep old friend??

Is it more important to keep old friends? My friend asked me suddenly. I considered this question for a while and dicided to write this journal.
From my point of view, making new friends is less important than keeping old friends. There are many contributing causes for this phenomenon. First, old friends can understand us easily and well. There is a good evidence to show that people are willing to spend more time with their old friends than the new ones. People are familiar with old friends, and they have a relaxing atmosphere with their old friends. Communicating with old friends is more easily than talking with new friends. I believe without a shadow of doubt. Only talking with my old friends I can feel much more relaxed, we often talk about our daily life and some jokes, giving some advice to each other. It is my old friends that help me to make the decision that suggesting me begin my college life in America. By doing so, we people will have less pressure and more fun. So they couldn’t feel tired or be lack of energy.
In addition, as everybody may see that old friends may do their best to help their friends, which new friends may not do. Because they have confidence in each others, old friends can risk their lives to assist others in finishing a mission. Just like the old battle companion. They are loyal to their friends and are desperate to help their companions. For they have shared their burden and happiness with each other. So, old friends are more reliable than new friends. As Chinese saying, one should rely on their friends instead of their parents when they stay far away from home. Maybe making new friends can be helpful in some way, but keeping old friends is more helpful to people, such as hunting new jobs, solving social problems or other affairs. By doing so, people can live an easy life. Supposing one person is lack of money, but his parents are not convenient to give money to him. What should he do? Only his old friends can lend him money without thinking. Considering keeping old friends is important.
Last but not least, making new friends can be useful to people. When people make new friends, they have to think about what they have to say and what they cannot say. That may be a practice for their skill of communication. More friends do people make, more skillful they will be. Besides, new friends can be many different kinds of people with many diverse jobs. When talking with these people, we can gain a lot of information and experience which we have never heard of. That’s interesting and amazing. People can become knowledgeable and experienced with communicating with many new friends.