sneaky bf ?

So lately my bf has been hiding his phone from me he sleeps with it in his drawer beside him which I thought to be odd considering we've always had access to each others stuff he changes his fb password a couple days ago so I went and changed mine so it's the middle of the night and I can't sleep coz I'm laying here wondering wtf it is exactly he's hiding so I creep in to see his phone and the passcode is changed and I can't get in and I'm laying here just furious like wtf are you hiding am I just being crazy or something I just want to punch him in the face and wake him up coz I feel like he's being a sneaky f*** and I can't sleep now 😢 note- I only changed mine to be spiteful or idk how to word it because he locked me out of his now I'm just fuming here