Stop influence on mind

Sitting on a chair, working. Sometime later finding yourself sitting in a position same as one beside you. Is this an automatic influence on mind, you are not aware of the position in which the other being is sitting ? Sometimes while working make same mistakes as the one sitting beside or in front. The status of the mind same as the people around. Doing those things as thought by other. How to avoid this? Is there any reference in Buddhism to stop this? What is such behaviour of mind called? There is another thing , would like to mention, the status of mind sometimes becomes same as the one who remembers you. For e.g when someone trying to contact you for very long time via mobile, the mind becomes the person who is trying to contact you. Is it something to do with chakra? How to guard the mind?