"Don't worry about knowing people; just make yourself worth knowing." -- Unknown

This quote basically means that you should build yourself into someone people would want to know. Someone that people will remember even when you do not remember them when you make yourself into someone worth knowing, and then people recognize you for who you are, not because they were forced to. Because of this the people you meet will actually appreciate you and want to stay friends with you. If you say you know a lot of people and try to force yourself onto them, they tend to keep themselves distant from you. It basically goes down to building yourself into who you want to be, instead of looking at other people.