If you don't believe in evolution then no one on an internet message board is going to convince you. There is far too much evidence to simply sum up into some sort of 'defining proof'. There is no one one thing which proves the theory, only a stack of palaeontological and biological evidence that makes it extremely hard to deny for any rational person (at least in the context of being the most probable theory explaining species diversification that we know of). If you're serious about learning more about it then you really have to do your own research. I would recomend reading this book
It's from a professor of palaeontology at Bristol University and it is one of the most comprehensive pieces of literature out there covering everything about the fossil record and it adresses many of the issues people have raised on here. Even better is that it is very easy to read and follow if you're new to the subject.
