Kaine/Mary Margaret.
I'm sorry to break it to you, but trying to scare me off won't work. One of my closest friends has tried to destroy my life more times than I can count. She even succeeded at it, for a while. But I learned that if I gave up on her, if I expected the worst, I would only ever get exactly that. I would have missed out on all the good she's added to my life since I forgave her.
So I'm not going to give up on you before I've even gotten the chance to know you. And there's very little you could say or do to make me give up on you after.