Why do we live do we have a true purpose???

What is the actual meaning of life?
Do we just live to work and support our families??
I mean most of us get up got to work to make money for paying bills...
Buy food and if your lucky do something you enjoy or talk with someone you love...
Go to bed and start all over again and again till you die...
we get to work at home during the weekends catching up on stuff not done during the week...
Seems we get one step ahead and get pushed two steps behind...
I know I cant ever seem to catch up in my life...
Every time I start to something else is tossed out in to the path...
I often wonder what is the purpose of my life???
I look a several people I know and see the purpose of there path it stands out...
Some people are here to ease the burdens of others and forever impact lives...
What about those of us that simply exist but really serve no purpose???
What about those who used up all of their reasons for being here on this earth???
Why do some people just take up space and others make such an impact???
I often wonder if I will wake up someday and find out life is not real at all...
I wonder am I just someones dream and when they wake up will I go away???
How do we even know we are real and not just a dream of some other creature???
Are we just microbes to some other creature and we really don't mean a thing???
Maybe we are all just a tiny part of a much larger being...
The only thing I know for certain is that one day I will cease to exist and will be gone for ever...