So much flustered Shia. He's really just trying to be helpful, but having your faults, like your lack of organization, pointed out by someone that you might like is really embarrassing.
Also, yes, the concern that you might bore or go over the head of the other person if you ramble on about the things you like. This is something I know a bit about, as someone with ADHD and a tendency to ramble about my interests to friends and family that sometimes get exasperated with me for it.