HOW DO I FIND THINGS TO MAKE ME HAPPY

First, by being honest about the things that do make you happy. Most of us lie about what would really make us happy due to what others may think about it. I think many of us already know some things that will make us happy but we don't pursue it because we don't wanna be judged if it appears too quirky, risque, boring, outlandish, dangerous, etc.
Secondly, just start experimenting with things. If there's even a small inkling that you might enjoy something try it out. Only through experience will you really ever know what you like and what you don't.
Lastly, remain open minded and try things you normally wouldn't do, you never know what fulfillment it may bring into your life.
Oh…and one more thing, be creative! Me and my best friend discovered years ago that it wasn't necessarily where we were or what we were doing that made us enjoy certain experiences, it was the energy we bought to any situation.
If you're creative enough you can turn almost any mundane task into something fun that will make you feel happy for the moment. So instead of always looking for things to make you happy, transform the experiences already around you into happy moments with your own unique spark.
Good luck!