Meaning of Life

So the topic for this time is the meaning of life. What do I believe about the meaning of life? Well, life is a precious thing and I've never really thought about something like this. Life is just something that is, and I never really thought about why we were put on this Earth. I have wondered sometimes, but never actually had deep thoughts and philosophied the reasons we were put here. Sometimes I wonder how we were even chosen to be put on this Earth. I wonder if there is a God that created all of us and put us here on this beautiful planet for a reason to praise him and worship him, or we were just a coincident of all matter like the big bang and created life. Sometimes I think we are here because God put us here for a reason, but sometimes I think we are just coincidental parts of matter all put together and there is not really a reason we are on this Earth. We just are. There is no reason for us to be living, but we just are, and we have to live and survive.
Then sometimes again I believe again that we are put on this Earth for a distinct reason. Maybe that reason is to teach someone something or to do something great for the world. It's like when I think of certain important people in history like Martin Luther King Jr. He was put on this Earth to lead the blacks out of slavery. That was his reason in life.
I dont know my reason for being on this Earth, or at least, I don't know yet. I feel like I'm on this Earth for a greater reason than just being alive. I feel like I'm supposed to be doing something more, but I dont know what it is yet. I never think about these things. The meaning of life is to do drugs and be happy. Live young and wild and free. The meaning of life is in this song I know entitled Young Wild and Free.
  Young, Wild, and Free --> [So what we get drunk, so what we smoke weed, we just having fun, we don't care who sees. So what we go out, thats how its supposed to be, living young and wild and free.] This means right now, just forget about our reason and stop thinking why we're on this Earth. Just right now, I'm young and in high school, and I shouldn't be worrying and thinking so much about life, just having fun not worrying about a thing. Just have fun now and I'll worry about everything else when I'm older and need to. Its prime time in the golden age of high school just have fun! don't need to stress about this stuff yet. Worrying for nothing. Now is the time to be free and just have fun. Some people say he meaning of life is 42, but I dont really get that . I just dont understand where people get the number 42.