You are an angel and of course since you are an angel you have the trait of being absolutely clueless when it comes to things besides what heaven taught.

You work with Castiel which means you work with the Winchesters which also means you have to put up with Crowley.

The issue is Crowley loves to mess with you whenever he is working with the Winchesters. Hence being now where you all are working on a case

"So... Angel how's it been?"