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i guess you realize your own compatibility with another person when your brother tells you that you finish each other's sentences, and doesn't even say it to be a dick. it should help that all of your friends say that he has the same personality as you, and they all like him. to confirm it, i would say this guy says that i am "the same person as me, only you don't have a penis, which is awesome". i think i have found a choice guy, but i'm the only person whose hesitant to say so because of my own insecurities.