You be high, huh? I feel it...
But if this goes along with the topic...In most cases, a person's perception of you will be based on how you behave around that person...Someone who knew you your whole life, might speak highly of you, but it could be based on an act that you've been consistently portraying around them...And someone who just met you might conclude something negative about you because they've only seen you doing negative things...So whether or not a person "really knows you" really depends on how much of your true self you show that person, and not so much how long they've known you.