Am I going crazy??

So my boyfriend and I have been together for 7 months now. I’m very open with my phone, meaning I leave it around the house, set it down and forget about it, all that jazz because there’s nothing on it that I don’t want him to see. He has done nothing to make me not trust him. He doesn’t flirt with other women, he doesn’t look at other women, he’s all-around great. There’s one thing that’s making me go slightly crazy, though. He has his phone on him 24/7. He’s looked through my phone a few times (I don’t even care because honestly it’s human nature to be curious). Well, I can’t even look through his phone because he’s either on it, or takes it with him. It’s driving me insane. He’ll unplug it from the car and take it in the gas station when he gets gas. He’ll take the phone charger into whichever room he’s in to charge it even when he doesn’t get on it. When he’s driving, he keeps it between his legs (I keep mine in the center and if I need him to check it while I’m driving, I’ll ask). I straight up asked him the other night to let me snoop through his phone before he got into the shower, and he said yes, but asked to call his friend. Then had to use the bathroom. Then, when he gave it to me, he sat next to me to watch what I was doing. When I asked him to just let me look by myself, he would pull the phone down to look at it to see what I was on. He has streaks on Snapchat with women but it’s not on his conversation page. He claimed that those disappear each day. I found a screenshot from Facebook where he was tagging a woman he plays games that said tag you whatever @ to be naked for however many minutes. He said he took that screenshot and sent it to her because he didn’t want to make me upset by posting it. I feel like I’m going insane because I’m so open with my phone and he’s not. I need someone to tell me if I’m crazy.