Um, so in situations like this, give him what I call the last supper of relationship talks. Sit down, talk with him, discuss the issue, ask for him to change. Um, ask for him. First of all, would you need to get him to, um, show you his phone? Like, I'm not saying you need to, but talk with him about that. If he still does not want you to, then I'm sorry, bro. That's the last supper talk, then you just leave him.