> I don't want you posting a photo of us together, because that sends the signal to other girls that I'm not available when I would definitely consider myself so.
The more "unavailable" you look the more attractive you are to women.
It's called social proof, a demonstration that you've been vetted and determined of value by someone else.
Not posting pictures with women because you don't want to look unavailable is like not putting your current employment on your resume. It is the opposite of what you should do by all means.
That's not how girls work...