I can relate. Very nice poem, nice work! I shut down especially when I'm mad...always have. I just don't know how to tell someone how I feel without sitting down and thinking about it. Try writing letters to the person who is getting you upset. Thats,what I do and it helps me to express my feelings so I can slow down and think about how I want to word things and say the exact thing I want to say rather than getting caught off guard and being flustered and not being able to speak.