I'll start off my saying i'm not a very social guy. I'm actually introverted, shy and quiet. So i have this friend i hang out with a lot. he's relatively social and knows a lot of people. but when i see him around campus with his other friends, he doesn't introduce me to them and i feel left out and awkward (since they all talk to each other, and i'm standing there like an idiot). why doesn't he introduce me to his other friends?