This guy has also seen a long list of short hookups, which makes his noteworthy relationships stand out. Karev planned on hooking up with every intern he could when he had made up his mind to leave Seattle Grace, and he followed through with this by getting together with almost every one of them. It was clear he was never interested in her in the slightest, though, as he took to ignoring her calls and even stopped acknowledging her presence. It seems whatever relationship Olivia had with a man, she ended up both liking and hating him. With Alex, Olivia held something of a grudge for over a decad,e as she was shown to be bitter about how he treated her simply for pleasure when she returned to Seattle. The few times they got together ended disastrously, with either of them catching diseases, or Olivia causing Izzie to break up with Alex.