[lotsofpulp]

I have always held multiple answers to "what is my life's purpose".

On a universal level, there is no purpose.

On a global level, there is probably no purpose.

On a societal level, maybe you can do something to help <insert whoever you want to help without harming others>, if that makes you happy.

On a familial level, people usually feel good interacting with family/friends, so the purpose could be to keep those feelings going.

Up to the individual to play the game or not play the game, no right or wrong answer. But if you are tying your happiness to expectations of being able to cause grand changes at the universal/global/even societal level, then you will probably be disappointed. Everyone's existence is almost certainly meaningless in the "big" picture.