Social networks! HELPPPP

My boyfriend and I have been together for 4 years. We have a 2 almost 3 yr old son, & we are expecting... I'm excited but unfortunately he's not. He cussed me out, telling be i better not post anything about this pregnancy, no pictures, no statuses on fb, nothing. Am I wrong for getting mad?! Or is there something going on here?? I am FAR from naive, but I don't want to think negatively in this situation. I feel like he's trying to hide it? But why?! Smh