How do you control your emotions, and sensitivity?

I have noticed that I have a hard time controlling my emotions and feelings; I always feel I have to express or explain my feelings into depth in order to be understood. I often wish that I can sit back and not let things bother me, perhaps have the ability to have a nochalant attitude at times. I think if I could just sit back and chill and not react to everything that goes wrong in my life and just take it for what it is I honestly believe things would be much better. Most of all I would be much more relaxed and comfortable. People often tell me that I am too sensitive, too nice, and express to much and you know they're right. Cancers what would you suggest? Since we are known to be the most sensitive zodiac; although we are great people I hate being so damn sensitive. Even if you are not cancer, I would appreciate your input as well.

Thanks in advance guys.

I have a rising scorpio and a gemini moon. That seems to do the trick.