be less emotional/ control my feelings

I’m actually going to look for some kind of self help book to help me with this problem.

I get very upset with people when they disappoint me by doing things which seem very petty and unecessary. I bring this upset home with me and then get even more upset when my husband is less than sympethetic to what seems such a big deal to me. I try and be a good person and do my best for everyone and get easily hurt when others do not reciprocate this. I then dwell on matters and blow them out of proportion getting more and more upset. Just writing about it is helping. I need to stop letting others upset me as easily as they do. Start thinking that people who do petty things are exactly that – petty and not worth getting myself upset by them. Perhaps I should find the extent of their pettiness funny and just plain pathetic, thus not letting my emotions run away with me.