Who knos? But the series was just as thrilling and exciting after Bones and Booth got together, proving that it can be done. I just watched the last ever episode last night. I miss the characters already =(

Yeah, I think you're right - you can be physically attracted to a person you don't like, but physical attraction isn't necessary for two people to be friends. The best relationships though have both friendship and physical attraction, if its just physical a couple won't last.