People tend to misunderstand what it means when people say 'happiness is a choice'. Happiness being a choice, does not mean that you have to be happy and maintain that emotion at all times. It's a part of being human to have negative emotions, as well as emotions we can't explain or put into words. Choosing to be happy means that when something negative happens to us, we're resilient in our reaction. Meaning we're allowed to have negative emotions, but it's untimely up to the individual on whether or not they will allow those emotions to be ignited or maintained. Some people may interpret this as suppressing your emotions and always keeping your composure. That is not what I mean nor is that healthy for anyone. We're allowed to cry and we should when we need to. It is a natural release of emotion, though not all of us are taught how to properly release them, and ultimately let them go.
I am not one to always be happy myself. I do allow things to irritate me more than they should, especially when driving here in Austin! It is always going to be my choice on whether or not I will hold on to the negative emotions to avoid being consumed by them. It's an easy trap to fall into, and a difficult habit to break yourself from if you've never been taught how to maintain your emotions. By all means, I am not this happy-go-lucky person at every moment of every day, and I do not expect anyone else to be that way either. I do however believe we could alleviate a lot of our pain if we understood and applied this concept to our lives.