Facebook problems...

So am I the only one whose boyfriend like 5 years ago commented about his ex and replied to her over facebook but when I try posting to him on facebook or tagging him he doesnt say anything. Hardly even likes it. I have to nag him to do something even if I post a picture of us. It makes me feel like he doesnt care to brag about me or our relationship and how much he loves me. When I confronted him he tells me that he just doesnt like the drama and he has changed from them and now. Like what drama is there when its us that needs to ignore it.... idk what to do because I know its Facebook but he is always on facebook as well... help please:(