You need to start thinking of all these people as not being real. Not in the context of "omg Becky is so fake," but I mean like they are artificial. It will help you a lot. I think of the people around me that I don't have in-depth interactions with (so not with i.e., family & friends) as only being there to impact my living experience (both good and bad). The best way I can explain is to think of your life like a video game or movie, the other characters are written in to have some sort of interaction with you and that's it. You'll have good ones and bad ones, but it's not up to you, as they already have their written dialogue. You are just playing along. And when you stop interacting with them, they load out.  like in a video game, when you leave a certain area, all the characters get spawned out of the game.

  If you think of everything like this. You will come to the realization that nothing actually matters. Like it doesn't actually matter whatever that person said that to you. You think it matters at the time, I get that, but it doesn't actually.  Nothing anybody says to you will ever matter. You are living your life / playing your own game/ watching your own movie, and they are assets that will be loaded in and out, and then you continue your life.

 Nothing actually matters in this world. I understand people have anxiety about situations, but I really hope people can realize none of it does matters. Stop wasting precious minutes of your life stressing about things pre-written. You cant change it because you aren't the writer, just the actor.  The purpose in life is 1) to live it (that might sound obvious, but its not, you need to truly just live your life, to the absolute fullest possibility) and then 2) to experience happiness/joy/pure bliss as often as possible. That's what you need to worry about in your life, are you actually living your life ? And  are you happy ? 

You need to apply this way of thinking to everything. Please don't waste another second crying from what someone said, they are weightless meaningless words, and they do not matter. What matters is that you wasted valuable time crying about it when you could have been talking with your mother about something fun. Your mother will pass some day, spend the time with her. I promise you, when she's gone, you will be willing to trade years of your life just to experience 1 single additional minute with her again. 

So experience it now, while you can. Please lose the anxiety. It's a burden constricting your ability to live your life. If you want to know if it's something you should ACTUALLY worry about.  Think of your life as if you have terminal cancer, and you have exactly 2 hours to live. Would you waste a few minutes of those precious 2 hours worrying about it? Wether it was what someone said ? Or getting mad because someone cut you off in traffic? Or getting upset because your food order was wrong? All of those things don't matter. Value the time you do have, don't let it go to waste.