It's interesting how just a few instances of surprise rejection early in life can have a big effect on personality. I ended up paranoid, always assuming that no one could really like me and anyone who acted as if he or she did was just pitying me or playing some cruel prank on me that I was too socially inept to see.
It got to the point that when I went to a school dance (I didn't want to but my parents made me) and the prettiest girl in the class asked me to dance with her, I actually got upset. I couldn't believe that she sincerely wanted to. I said yes because it would have been rude to say no, but I was convinced that everybody including her was secretly laughing at me.
I only considered the possibility that she was sincere years later, when I was an adult, but even now my brain is telling me "Nah, loser, she just felt sorry for you."