Learn to be grateful
It is impossible to be sad, and REALLY grateful, at the same time.
Gratitude raises your vibration to a much higher level, and, if you do it consistently, every day, really feeling what you are grateful for, all the blessings you DO HAVE, 2 things will happen:
First is, you will FEEL BETTER about your life. Genuinely better. And that is the goal everyone has: Happiness.
Second is, you will attract more to be grateful for. That is how the world works: You focus on the GOOD, and you will see more good show up.
Learn to direct that focus, to the good, the great, the blessings in your life.