Heather
Story of my life. I've had to fight someone I loved before, had to accept that I might have to kill him one day. Got lucky on that one, but even after he was good again, he was never the same. He was a lot like Sam. I think it might be one of the reasons why Jack doesn't like Sam...because he knows I loved someone like him before.
I'm glad I'll never have to kill Sam. It would break my heart.