Do you believe happiness is a choice?

I do believe happiness in and of itself is a choice since it is a mindset, but it does not necessarily change your feelings, it is just a matter of changing your perception of them. Therefore, two people could feel the same way, and one decide they are happy and the other that they are not. The ability to do this comes from peace, or from a solid structure of understanding and belief relative to your reality. Despite this, I do believe we all feel longing, and this cannot be easily counteracted by perception, and when it is, it is usually by delusion and ignorance. I believe in this case happiness comes off more melancholy.