My bf won’t add me on social media

My bf and I are in a good place and enjoy being together. We’ve been having good sex lately.

But one thing that has been bothering me is that he won’t add me on his social media. I asked him if he would add me on his Facebook and I sent him a friends request and he says that he will, but he never does. I’ve been asking him for months. And he is on it every single day.

I can only see when he posts a new profile pic, and I can see who comments and likes it. And soooo many girls like his pic and comment on it. But I can’t because he won’t add me.

But I’m his fucking gf.

I know it’s so stupid to be mad at this, but it’s like why are you adding other girls but won’t add your girlfriend ????

We’ve been together for 4 years.