Jane | Steve
Don't apologize, Jane, thinking about the hard things is part of being human. I'm honored you are comfortable enough to reach out to me with this.
Of course I'll be there for him should anything ever happen to you - you have my word. I understand how short our time really is in comparison. Perhaps having a friend who both understands the human lifespan and who lives outside it, a little, will be good for him if anything happens.
It isn't a burden if I can help ease your mind on it. Thor is lucky to have you. I promise I will do everything I can as his friend if the need arises - I hope this helps put you at ease, too.