Bf won't post pics in social media

Me and my bf started dating about 7 months ago and we both love each other very much and we see our future together. But like every couple we have our issues and ours is that i can't get over the fact that he doesn't want to post a picture of us in IG. He says that anything could happen and he doesn't want to be deleting pics so he has decided to never post me. I'm just so upset by this and we had a big fight about it. I trust him because i know he's not doing it so that he looks single but idk it bothers me so much and when i mention it he says that he has never done it and he won't do it for that reason. 😪

*UPDATE*

His family knows me, all his friends too, it's not about me not trusting him because he is loyal to me but i just felt hurt knowing that's the attitude he feels, although he has told me a lot that i am the one he wants to spend the rest of his life with and he really wants to be with me no matter what. So idk maybe I'm finding it hard to understand.