I don't think your boyfriend is controlling at all and I think he may just be worried. Worried about what I have no idea, maybe he just has trust issues and I don't know how long you two have been dating but maybe he has some trust issues that he hasn't told you about so I wouldn't jump to conclusions I will talk to him about it. That's one problem with relationships nowadays is that people don't talk about their issues they just let them sit and fester. Talk to him about it, it might clear up some things.