Before I euthanized the snake, I talked to one of the people at the sanctuary about the Burm and he told me if it was really that bad I can go ahead and freeze him and dispose of him however I needed to. So I did talk to someone before I made the choice the euthanize him just to make sure if it was ok with him that I did that. I did tell him to check all the other Burms in case they got it too.
I felt I did the right thing with freezing him because I simply do not have the heart to smash its head and do not have money to take a snake that is not mine to see an exotic veteranarian. In the future, I wont be making a thread like this again, and if my snakes do end up getting what the Burm had I wouldn't dare to post.
Thanks to the ones that did have nice posts and the ones who posted helpful info that didn't offend me.