What is the sound of one hand clapping? I have no idea. But I do know that you don’t achieve happiness by seeking happiness. You achieve happiness almost in hindsight, after the fact. It is when you are doing and being that you are content and happy. And you can only realize this upon reflection. So don’t worry so much about being happy. Focus on doing and being. Be the best human you can be. Do things that help yourself and help others. Be nice. Be compassionate. Do your best to help make the world just a tad bit easier for the people you meet in life. Find hobbies and projects that help you calm your mind. Produce something of beauty and share it. And finally, volunteer to help someone in need.
Living an ethical life of personal fulfillment that aspires to the greater good of humanity truly is the best way to become happy. In my humble opinion.