His social media...

I been talking to this guy for a few months now. And he won’t add me on social media. When I first met him he said” I don’t really use it” then now that I decided to make another account and I added him on it and he added me back. I notice he actually does use it a lot. So I brought it up again and he said the same thing and that why all of a sudden I was interested in having each other in social media, if we txt all the time. I have also noticed that he just added his new girl-friend on IG. So idk why he won’t just add me. And when we did have each on snap he made it so I couldn’t see his story. Idk if I’m overthinking or not. Any advice??