Spend much time alone.

Usually when we are thinking while leaning against a wall others think us mysterious n want to know about us more n more , but you must keep this in mind not look sad or depressed, not happy either, just thoughtful. But before that you must learn first to live by your own and love yourself a lot which give charm to u , the signal you want to project is extreme independence and not needing anything/anybody else. This crucial step will come off alone if you really are an individual who loves his own being