Sure the Bible says that, but there are plenty of other religions out there and the people who believe in them feel just as strongly as you do about them. Its impossible to know which one is right.
Lots of religions say that you're supposed to love your god. Among all the religions out there, there are many ways to do it and various groups worship their gods in different ways. Are you supposed to pray five times a day while facing Mecca? Just go to church every Sunday? Sacrifice a goat every month or so? If God wants us to behave in some particular way, he should make it clear, at least every few hundred years, instead of leaving us a millenia-old book that's been translated and retranslated countless times and is open to many different interpretations.
Also, if God came down and explained things better every few hundred years, we would at least have evidence of his existence. That's my problem with religion - we have nothing left but our own feelings to pick a religion, and we have to just assume our beliefs are true. Some people even falsify evidence, and other people's need for evidence creates a market for it, which is where you get people making websites and books about finding living dinosaurs and Noah's Ark and whatnot. Its how Kent Hovind makes his money.
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