Life is simple. When you're not happy where you're now it simply means that you're not supposed to be in that place. When you're not happy with the person you're with, it simply means that you're not supposed to be with that person, or that person is not supposed to be with you...
The feeling of unhappiness tells us that something is not right. That you're in the wrong place, or with the wrong person.
Being happy is more than a state of being. It's not luck. It's not something that is given from the outside. Being happy is one's duty to herself or himself, it's our duty to the people around us; it's our duty to God. Being happy is our destiny. We must seek for it, we must pay for it. We must risk for it.
