Anyone else get jealous over fictional characters?

Seriously. It makes me feel like shit, I know it's something really really stupid but I cannot help it at all. I have several trauma from people putting fictional characters over me that I cannot handle my significant other making jokes about liking a character. I feel terrible, and horrible. I just worry that maybe by telling him I'm limiting him or that I'm just. not letting him speak, or not letting him have his freedom but everytime it happens it just hurts so much.

It just always cycles back to the same thing, to the fact that I don't look like those characters or just don't have anything in common with them and they like them but also like me so I get confused and feel abandoned. For reference, I never mention any fictional character ever when I am in a committed relationship, I don't even think about fictional characters, I just think about my partner, so obviously it hurts a lot to know he likes something fictional more than me (Even now, I know i'm being dramatic and that he definitely loves me more, but it's hard to believe).

I asked him to stop making jokes about fictional characters because it hurts me, but I feel as if I am being selfish. Just seeing if more people relate to this feeling.