i am the same way. for a while, people were timid when around me because they didn't like how honest i was or that i had the loudest group in the bunch. so when i'm out with friends, i try to talk in a lower voice and try not to be the center of attention (even though it KILLS me). people probably perceive your outgoing attitude as a cover-up to being un approachable. all i can say is to try to be friendly, but not over the top, to everyone you come in contact with.
