The guy who sent you here... That would be me.

Baughn's links are a nice place to start. For the 'Ever wonder why we're here?' question, you should probably see Mysterious Answers to Mysterious Questions. It doesn't answer that, but I think it's vital if you're ever to find a satisfying answer.

And if you think, even a bit, that it'd all be pointless if God or Jesus had never existed... You should read Explaining vs Explaining Away and Joy in the Merely Real. Everything that's beautiful about the world is beautiful no matter what!

Of course, you're not going to buy all this straightaway, and that's fine.... Just leave yourself a line of retreat for now. (And that's another article you should read, especially if all of this is beginning to feel overwhelming.) But don't just rationalise all of this away-- it's an easy trap to fall into (and some of your friends have already fallen into it, from what you were telling me), and it's kind of pointless if your doubts end up just 'confirming' everything you'd already believed