by saying hello to someone and giving them a nice smile. this can make the way for you to start warming up to any difficult person. you will notice that sooner or later, this person is going to give you some of their time and want to be friends with you. take advantage of this and make it work for you. do not let a difficult person get you down and make things hard for you.
you can also try and ask the person that is giving you a hard time about their life. ask the how they are doing or what they like to do as a hobby. this can 