Some people say, after being friends 7 years, they become friends for the rest of their life. It is easy to meet new people, maybe thousands of persons across your entire life, but you always will count your friends with your fingers.
That is why, once you are starting to enhance a good friendship with someone, you are discovering an intangible treasure. In my short life, I had experienced how friends had been supporting me while I walk in financial crisis, diseases, emotional problems, urgencies... when the rest of the people just dissapeared.
Also, friends are the persons with you most enjoy your triumphs, professional success, travels, eating, exploring new places, parties, etc.
So the closer friend you have is yourself, so become a better friend to the ones you have, and surely you will stablish a better friendship and increase this great intangible richness.
"A man that hath friends must shew himself friendly; and there is a friend that sticketh closer than a brother". Proverbs 18:24.