Emotions :-(

I have very few things that upset me in life, but when they do upset me, I really get upset. As a child I sort of realised that when I talk about the things that upset me, people tended to get hurt and upset but they don't necessarily consider the reason I am upset. People would say I like to blow up which I didn't, I mean how can anyone like blowing up? It made me so sad because I rarely expressed my feelings and no one really knew me, what I liked and what I didn't like. I was taken for granted a lot because people assumed they knew and for some reason no one bothered to find out who I was and what I wanted. That hurt but I figured people preferred a quiet me to a verbal me.
Even now I find I have very few things that upset me, I have tried to discuss them but even now I still feel misunderstood. I am not asking for a lot, I thought that once I grew older and crossed a certain stage then I would be free to be myself and be accepted for who I am :-(. Sadly that is not the case. To keep the peace and to ensure happiness, I find that I have to keep my feelings bottled up inside me and pray I don't boil up or I don't give up on myself or on life. I think yesterday was one of the saddest days of my life :-(. I just pray and hope that I can keep quiet and keep my feelings locked up or written down somewhere for it seems I keep saying all the wrong things or saying things that are not attended to.