FWB getting into my emails 🤔😠😣

So the other day I found out my FWB got into my emails. I called him this morning and told him why he would do that. That’s my personal life. He’s super controlling and jealous type of guy. I told him why he would do that, and he says because I am hiding something from him. I told him I don’t need to hide anything from you, but you went over with this. It’s like I am not getting any emails now. Wtf... we are just FWB but he thinks he’s my boyfriend. What should I do??? Should a FWB be allowed to do this kind of stuff?? Even if he would be my boyfriend I wouldn’t let him have access to my emails or my phone, that’s personal right ladies?? I don’t want anything with him anymore.