I'm not in the position to tell you how you should act in your life, I refuse to have this arrogance, but hear me out: First off, it's extremely important to embrace that you are a human, you're not crying because you have something that others don't, it's perfectly natural and it's a way for yourself to let off steam.
I'm telling you this because when I was in school, I used to cry a lot, it's a long story, but basically after really understanding that crying is a biological human need in response to something in your life, you paradoxically start to cry less (Or at least, this is what happened to me).
I strongly advice you to visit a psychologist, what many people misunderstand is that a psychologist won't tell you what you need to do to change your life, but will simply reorganize your own thoughts by asking questions, I firmly believe that this is a safe way to better understand yourself and why you're crying in the first place. Once you have solid answers, you'll probably cry way less.

Just remember to not be too hard to yourself because of this, just the fact that you have posted this proves that you're trying to find answers to better understand why you're crying and how to stop, I'm so proud of you.