Positive attitude is not a problem to handle, those people always motivate us in order to perform better, the difficulty is to handle people with bad or negative attitude. At that time , we need to keep control of our stress, and not give away our positive attitude. If someone behaves bad with us, it is wise to let them know of how you feel, instead of keeping quiet and regretting it later. Nothing comes first, but your values and your respect. Engage yourself in other activities and ignore any counter attacks. At last, those people, sooner or later, will start giving you respect, and if they don't, they will just vanish out of you life without much ado.