I've had this problem on occasion- like in high school and at certain jobs I had I think people just thought I was a snob- when the total opposite was actually true. I was kind of a nerd in high school- very smart, so that combined with being quiet probably had some people thinking I was a snob. Then at this one job I had, I hated it, and I was severely depressed at the time, so I kept calling in or not showing up, so I finally quit, and when I showed up to get my final paycheck the manager reamed me out and called me a snob- I was too upset to respond, but my jaw was on the floor when she started talking to me like that, then I was almost in tears because I felt so misunderstood and didn't know how to communicate and speak up for myself. I think that one reason I stay so quiet is because I lack assertiveness, and I either feel like I have nothing worth saying, or that people won't care about my opinion, or think my viewpoint is stupid. I know I shouldn't care what people think, but I've been like this for so long, I just don't know how to break out of my shell. I want to be more social, but I feel that if I try to be more social, it will be obvious how socially inept I am.