Someone close to me suggested I might possibly be fictionkin of someone very powerful and well-loved from a really famous fandom, and I can see why they said that but I also hate the idea. I don’t feel good enough, I’m nowhere near as great as he is. I feel like I don’t deserve it. Is there anything I can do to accept the idea long enough to explore it fully?

I’ve struggled with similar feelings. Honestly, I think the fact that you feel like you’re not ‘worthy’ is a good indication that it may be a real connection, and not just a straw you’re grasping at to be ‘cool’ or whatever. As for how to accept the idea to explore it- I think the best way is to just keep it to yourself for a while and do a lot of deep thought/mediation/personal exploration before you come to any firm decisions about how you feel. Let your friend know that you’re thinking about it, but that it makes you uncomfortable and you’d like some time to explore it personally.