There are lots of emotions that we all experience such as happy, sad, and angry plus others. We experience these emotions in response to our thoughts and feelings and because of what is happening around us. We are all different so the same thing could happen to two people and yet they could both feel totally different emotions.
Regulating our emotions is a skill. Some of us learn to regulate our emotions as we grow up. For example, when a child spills their drink they may be distraught, but as they grow up they no longer become upset by this and instead learn to pick up the cup, clean up the mess and get a new drink. We are all different so some people find it easier than others to regulate their emotions. It is also important to remember that at times everyone struggles to manage their emotions.