There are several definitions of happiness according to Merriam Webster, and the one that most Americans hold is:
a pleasurable or satisfying experience.
Depending on our values, we think these things will make us happy:
marriage, children, wealth, prestige, health, power, sex, pleasure, leisure, revenge, Christ...
But even Christ does not promise this kind of happiness because it's fragile and temporary, based on circumstances. If we trust Christ, he promises something better:
a state of well-being and contentment : joy.
When facing difficulties, it helps if I shift my focus: Instead of simply wanting to get rid of the difficulty, I ask God to strengthen my faith and help me deal with the difficulty in ways that honor Him and give me inner peace and joy.
How has the Lord helped you deal with difficulties in your life?
Merriam Webster Definition