This sticky wicket is that he not only has pretty severe slipped seeming, but also the pooka flaw, mortal inhibition. If you're not familiar with it:
Mortal Inhibition (4pts) - Something about your mortal seeming makes it nessecary for you to pass almost all your time in your animal mien. Maybe you're on the FBI's Top Ten Most Wanted list, or maybe you are a child who should be in school. Perhaps you have a horrible birth defect that makes people stare at you in horror whenever you go out in public, or perhaps you have Changeling features that put both you and the Escheat at risk. Whatever the case, you find it much easier to stay in your animal form the majority of the time. This produces many problems for you, the least of which is communication, but it's not nearly so bad as what happens when you take on your Changeling or mortal form.
That, plus basically having it drilled in that his very existence is a danger to the Changeling Way, and a danger to any around him (cruel, but not... entirely false...), makes him very reluctant, nearly phobic of going out as Connor rather than Buddy.