No matter how it is, your always going to meet people that “grind your gears” but be the better person calm down and live the rest of your day normally. Find your happy place or just do something that will distract your mind. To try to fix your situation try to interact and find a topic or field with that person. Hopefully you click and your now friends and your day is easier. If not oh well at least you tried. Live your life for you, don’t let others that you don’t need control your life.