My girlfriend has been in a serious relationship and serious friends with benefit relationship as well. She's taken photos with them but doesn't want to take pictures with me or make our relationship public via social media?

Well, either the glass is half Empty or Half full . . .

So you are either someone who she is dating while waiting for something better . . . . OR, your relationship is so special she is treating it totally different then her past ones . . . . Because its special.

I know how you can solve this . . . C O M M U N I C A T I O N . . . .

Talk to her . . .