Honestly yes, but first of all he allowed Tyler to come back to MF so i expect Caroline to just move on.I dont think Caroline has ever admitted to even liking Klaus.So I wouldn't consider Hayley a rival, I dont know why there is Klaroline hype not even once has Caroline reciprocated Klaus affection/interest. If it's there i must be blind or Klaroline fans are watching a different show.
They have chemistry and that is why people go so nuts over it. It did seem like she had a crush on him, though she never wanted to admit it, and she did seem conflicted about him from time to time. She called him to come save Damon and he saved her life without having endangered it to begin with for once. It's mostly girls, because he is the ultimate bad boy. There will probably be something between them towards the end of TVD's end, if TO is still going.