While life is filled with happy, fun, and loving moments and memories from the relationships you build around you, there will be tough times as well, of course. There will be some people in your life in which your paths were simply supposed to go different ways, and that is perfectly okay. Not everyone you meet in life is supposed to be permanent. Sometimes when these paths start to stray away from the ones you were on together, the outcome can be pretty rough. There will always be some people in life who will go out of their way to make sure you cringe. Because of the falling out you two shared, instead of bettering themselves from the experience, they would rather take any opportunity they can to tear you down, or watch you get upset. The best way to treat these situations is to always remember you are stronger than what they are trying to bring you down to.
These type of people are losses in your life that you should be grateful for. You will never need anyone that is capable of treating you in such a poor and immature way after you've disagreed with them. They could be an ex-boyfriend or girlfriend, a friend, a coach, a teacher. Anyone in your life, could possibly bring upon this kind of experience.
The situations you could find yourself in with these kinds of people can be extremely uncomfortable. Whether they're giving you dirty looks, saying things at you under their breath, talking about you behind your back, or posting about you on social media, the most important thing there is to remember is that you are better than their immature actions. They will do anything to feel as if they are above you, as if they're bigger than you.
They aren't, and they never ever will be.
Despite all of their attempts, you cannot let them get to you. Hold your head up high, and remember your worth. There is nothing wrong with having a falling out with anyone in your life. Everything happens for a reason, so if they aren't in your life anymore, you can't doubt that it is for a good reason. If they can't understand, or respect that, then they have some growing up to do. You can't let them get you down, make you cry, add stress to your life, or make you question your worth. No one has that kind of power over you.
You have the strength in you to look right past them when they are trying their malicious ways on you. You are bigger than that, and they are NOT bigger than you.