no one can determine your happiness but you; and it begins from the mind.

Our mind is a labour room, pregnant with the idea we feed it till its birth. Most actions we take in our conscious state comes from the mind.
Happiness is not measurable, profitable, nor tradable. Yet, above all else in the world, it is what people seek. They want to have happiness, and want to know they have a lot of it. But, happiness like air or water, is a hard thing to grasp in one's hand. It's intangible. So how does one know if they have it? Is it just feeling? And if someone does not feel happy, how can they go about achieving that feeling?
People can be happy if they have something to strive for and something to laugh about; but is that it? Can people with goal and a sense of humor be unhappy? Well, yes; after all the final key to happiness is the decision to actually be happy. Human nature can see negative energy anywhere; people can fixate on problems instead of solutions. So at the end of the day, "happiness depends on oneself". (Aristotle). As Lincoln said," most folks are as happy as they make up their minds to be.
Being happy with who you are and what you have, is a decision that has to be consciously made. Finding laughter in life is important; but at the end of the day, a person needs to make a choice about happiness; they need to agree they want it, deserve it and can have it.
In conclusion, only you can determine your happiness; the world might want to take away your happiness, but you and you alone ownes your happiness. Irrespective of what you are going through right now, you can still say to yourself "I want to be happy and put smiles on my face always".