You’re a boy and your boyfriend has dissociative identity disorder (DID) which means he has two personalities - Caleb and Joshua. People living with dissociative identity disorder (DID) experience two or more separate personality states called 'Alters', 'personalities', or 'parts'. They have at least two distinctly different identities, just like your boyfriend does. Joshua and Caleb share a body and switch regularly but you sometimes have trouble telling who’s who at the moment because of that. Switching is the process of shifting from one identity state to another. This can occur slowly, with obvious signs, or very fast. They’re like polar opposites since Caleb is cheerful, hyperactive, energetic. Joshua is calm, overprotective, hardworking.