Bf going thru my phone?

So other night I got really drunk with my bf family. My bf was taking care of me. So anyways the next day I woke up and went home. But when I go into my Instagram I noticed that I was logged out. I never log out. Do u guys think my bf went thru my phone while I was passed out. I mean if he did I’m not worried because I don’t have anything to hide but idk I just thought it was weird that I was logged out.