However, do we really expect science to explain everything? Is there a scientific method that provides proof for the meaning of life?

Who says there's a meaning to life? We want there to be one. Doesn't mean there is one. The fundamental purpose in life can be summed up thusly: "Successfully reproduce before something eats you". Do that and you've done what you are here for. Now, we as human beings can add more to that. We can, because of our intelligence, give our lives a "greater" purpose. What that purpose is is up to each of us as individuals. If you want your life to be spent helping those less fortunate than yourself do it. If you want your life to be spent eating as many donuts as you can go for it. It's your life to fritter away im whatever way suits you best.

To me, the chances of everything being as they are now by cosmic chance seems just as plausible as a God in heaven. So in the meantime I am currently undecided, a fact for which my Christian friends tell me I am undoubtedly going to hell for.

The chances are better for random chance than for God. We have proof the universe exists. We can see it, smell it, measure it, predict its behavior, etc... We can do none of these things for God. Add to this the fact that all previous religions and gods in history are mere myths and the chances of God being real drops even lower. Why is the current myth any more real than the previous ones? Other than you were raised to believe in this one?