Be mentally active and speak quickly. The mind is idle much of the time, as a result, it seems dumb. People can feel this and this project a bad image of self. And they will try to avoid you. Think quickly and speak quickly. Exchange mind with peers. If no change, other people will be smarter than you. Dont' sit idle, respond. Life is too short to waste. And other people are not that dumb as you subconsciously think.Be more mentally active!