Boyfriend lets me do my own thing because he's too normal-tier to be into cosplay (we met through school), but he's very supportive and wishes I would share more of my hobby with him -- not out of deliberate secrecy, I just don't tend to talk about myself much and like to keep regular life and cosplay stuff separate.
He's a great film photographer, though he specializes in urban photography and doesn't have the same priorities for cosplay-style glamor/portrait shots. When we tried a serious-mood shoot once, I just kept goofing off and flirting with him.
He's insecure about the relationship. How you approach that will be specific to your own dynamic, but it might help to sit him down and talk frankly about some of the things that other anons have brought up. Ask him what he's afraid about. Let him know that you're doing sexy stuff for fun, and -as much as this *is* just fluffing him up to soothe his insecurities- let him know the things that you like about him, uniquely. He thinks of himself as still another fanboy in a sea of faceless fanboys, but if you chose to be in a relationship with him, it's more meaningful than that.
> he even brushed my wig for me without a second thought since i can't reach the back
Anon, that's so fucking cute