I have a fictional character crush on bob from bob's burgers
Why would you have a crush on a cartoon character?
I like the way that he looks
There's nothing wrong with having a crush on a cartoon character if you like the way they look. As long as you understand that he isn't real, and the crush doesn't get out of hand, then I think there's nothing to be ashamed of.
He's not real (laughs)
It's good that you realize he isn't real. As long as you don't let the crush develop into an obsession then there is nothing wrong.