The fact that it worries you is a plus. You're not assuming this will be easy.
Tell you a story. There's a demon. Name of Azazel. I don't know if you heard of him. He...died. Anyway I worked for him. For so long I don't really remember any other kind of figure like that in my life, closer than a father, closer than anything else I've ever known. Until Sam.
And I was with Sam for a while by the time the seal brought Azazel back. And knowing what would happen, what the people here would have to do, I still wanted to save him. I still wanted to warn him to run because I didn't want him gone from my life completely. But in the end I knew, he had to die. And it was the hardest thing I've ever done not helping him. In spite of Sam, the family I have here, the friends. I let them kill him because there was no redemption for him. Never would have been.
It can make it easier yes, but it can also make it harder. And you have friends here, you can make more and you have the delectable brothers Salvatore. That's got to mean something?