Saying "YES" to happiness means learning to not stress out over people or things you cannot control or change.
We only have control over our own actions and feelings.
Remember life is 10% of what happens to us and 90% of how we react to it.
Start your day off today with a positive affirmation and repeat:
"Today, I promise not to stress over things that I cannot control."
Things you CAN control right now...
How many times you smile today.
How much exercise you get.
The food choices you make.
How often you think of your past.
Your level of honesty.
How many times you say "I love you."