Thoughts on your SO not posting you on social media?

What are your guys’ thoughts about a persons SO not posting them on their social media? I am currently in an about to be 3 year relationship with my boyfriend. He’s only ever posted me on his facebook once, and maybe 3-4 times on his snapchat but he only has his family on there. I post him all the time everywhere, on my snapchat, facebook, instagram, twitter, etc. I always post pictures of him and tag him on stuff on facebook, whereas if he wants to tag me or show me pictures on FB he private messages me. I can’t help but to feel like he doesn’t want people to know that we’re dating, that we’ve BEEN dating. He doesn’t necessarily hide me from the public, we go almost everywhere together. But he has talked to other girls behind my back on social media before, and I think thats where my insecurity is coming from. I’ve voiced my concern to him but every single time he tells me “I don’t like people in my business. No one needs to know every move that I make and what I have and don’t have. Also, I have male friends on facebook that I don’t trust and I don’t want them to try to add or talk to you.” But what irritates me is that he will post his family, vehicles, job, etc. but not me? Like I said he’s posted me once, but we’ve almost been together for three years.. It would be nice to be shown off once in a while. What are your guys’ thoughts? No rude feedback please.. this is something I’ve been insecure about and I don’t need people to try to talk to me like I’m stupid. (I’m just adding this bc everytime I write a post on here, people are so rude and ignorant and have no consideration for others’ feelings.)