I was raised old school, where big boys don't cry. Then again, it was also very inappropriate to express most emotions. So I learnt to swallow my emotions. As a result, I didn't even cry at my father's funeral, nor my uncle's funeral.
Now a friend recalls me crying after Dad passed away, but I do not. I do recall crying the night I nearly killed myself though. Outside of that, nothing
Then about 6-7 years ago, I had a major...Anxiety attack, on set of depression, or something, and that all came crumbling down. For about a month, my emotions were completely out of control. It took me quite sometime to rebuild those walls.
I still keep my emotions at an arms reach, if you will. But they aren't kept as well in check a they used to be.
Of course this presents some problems, such as being unable to relate to my own emotions, especially the less angry ones.