There is a large amount of people, that are very emotional (Including myself) its not something we can really help, it just happens its like, our brains are going wow thats deep so you have to cry about it. But some people do overreact but it is easy to tell, if they get over it really easily they are probbably ovverracting. It all has to do with the chemical signals sent around the brain, like say somepony is yelling at me, my defence is cry, and don't stop. I cant control it, it just happens withought warning and it's annoying but hey it happens. It may get annoying to hang around these people but, just remember it's not like they are trying to be that way (unless they are then you have a right to get upset) Getting upset with a naturally emotional person when it comes to being emotional is like getting upset with your eyelids cuz they blink.