Life is what it is and everyday I wake up excited as fuck to live another day.
The truth is you don't know if life is meaningless or not. Nobody truly knows how existence began. Nobody knows how it will end. Nobody knows what happens when you die. It's just a belief, a belief that limits you.
But you got this desire in you to know the truth. Why? Because you want to live by the truth! So why not live by it to the best of your ability? Why not strive to create meaning in your life? So what you don't know why you're here, why the fuck does it matter? How is sitting in your room sad all day more meaningful?
If I died tomorrow I would have no regrets, because since I realized we have this insatiable desire in us for the truth, I've lived each day to the best of my ability in search of it. And in that truth I've found meaning.
There's greatness in all of us. We all have the ability to do things we can't even begin to imagine, with talents and skills in us that we haven't even begun to reach for yet. If you're unhappy with your life, stop doing what you're doing and try something new already. Learn a new skill, read some books, and do something about it!