my boyfriends FB

My boyfriend and I have been living together for about a year and expecting a baby. We're not married but what's the difference when it basically feels like a marriage when you live together. He made me delete my Facebook when I moved in because his friend who lived with us the moment found me and showed him my Facebook. I didn't have anything bad and didn't use it for anything other than connect with family. But apparently my pictures were for attention and I kid you not, none of my pictures showed any skin. I guess he just had issues with social media. Anyway, I never caught him using any of his social networks although I know they're still activated. He did deactivate his Facebook but he has a pool game which he's addicted to and decided to activate his Facebook again in order to play his pool game. Anyway, just recently I noticed a different profile picture bc of his poop game. Not a picture of him, just a random picture of a bathroom he did since he's a contractor. So I didn't say anything.. I have never caught him on Facebook since he activated it. We're together a lot except when I go to work. I know he can easily access it. I don't know if I should ask or do I not have a right to? And if I do, how do I ask? I'm pretty upset because you have to go into Facebook in order to change your profile picture. How is it fair that I cannot have my Facebook when I had nothin bad in there and only family but he can have his and could be easily lying about getting on it. Any advice?