Just stay calm. He's going to say you have nothing to worry about. Which is most likely not true, though we don't really know.

He's got no motivation to tell you the truth, or to prove a thing to you. He is getting what he wants.

If you really want him back (not going to pass judgement on that) you have to STOP IT, in my opinion. He has to show you that he is serious, for real. So far, he just uses you. And then you hope....