Should I be concerned that my boyfriend does not post me on social media?

My boyfriend and I have been together for almost Four years. I normally would have never thought about him not posting me on social media, but red flags started happening. Mutual friends of ours would tag us in photos and he would never accept them. We went on a trip to Germany and I tagged him on the photos, and he would not accept them. I brought it up to him that I thought it was weird, and he photo shot him accepting it, but when I looked at his page, he removed it. I started to look at his facebook more because it seemed so off to me. He had all kinds of posts with him and his Ex raving about how wonderful she was. I told him this was hurtful etc… he took most of them off after I said it made me feel insecure and that I am not good enough. I posted some pictures of me on Facebook, and he never liked any of my photos. I know this is childish, but I blocked him on facebook because it was just too painful to see that I am not a priority. We recently added each other back on, and I could see that he “loves” every one of a co workers photos. I brought it up to him that I thought it was a red flag and he said, “its not because she is a woman, she's happy and she's my friend”. Any time I bring up the facebook stuff he makes me feel so small for talking about it. He absolutely refuses to post any pictures of us. I knew his ex and one of the things she's said about him was he gets drunk and talks to other girls on Facebook. I fully understand that social media destroys relationships and that its petty for me to care. I just have always had a gut feeling about him that something is off. I have tried several times to talk to him about it, but he just says that I am crazy. I have no one to talk to about this and not sure what to do. I feel so insecure and I don’t even want to talk to him. I am not sure if this is terms to break up or not. Its not the posting hurts the most, its that I bring it up and he never tries to fix it in any way. What should I do?

Should I be concerned that my boyfriend does not post me on social media?
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