Disappointing Book Ending

"So Lyra and her daemon turned away from the world they were born in, and looked toward the sun, and walked into the sky".

Yes, the "Golden Compass" is a fantastic book, my favorite character being Iorek Byrnison. However, it had the most disappointing ending of all time. The ending should not only make me want to read the second book, it should give me a sort of satisfied feeling inside. The man and woman that were throughout the book fighting, suddenly kissing was not a good ending. The guy pleading with her to go with him to another world when he should be tragically killing her or something along those lines was ridiculous. So, maybe I don't have good reasons for the ending bugging me, but somehow it did.