<human>: Summarize the given text in a few sentences.

I trust my husband with everything. I've never cheated. The most I've done while in a relationship with him was text an ex of mine (who was still my friend) and not tell him he was an ex. Apparently that wrecked all the trust he ever had with me. (He found out by going through old texts in my phone) I haven't talked to my ex since, and completely deleted him from my life. 

However,  my husband is constantly looking through my Facebook, my messages on my phone, my Web history whenever I'm not around. I get that he is jealous, but it's really getting out of control. I asked him about it, and he doesn't deny it, but I don't think he sees a problem with it.

I will voluntarily let him use my phone and go through it if he wants, I have nothing to hide. I just feel as though he's checking in because he thinks I'm up to something, which I'm not. 

And even though I have offered for him to use my phone to Google something or call someone or whatever he wants if he doesn't have his phone, he refuses to let me use his if I don't have my phone. I don't think he's cheating, I just think he's hiding something, and I have no idea what. I don't know how to talk to him about this without making him angry.
<bot>: My husband doesn't trust me, but has no reason not to. He won't let me use his phone, but is constantly looking through mine when I'm not around. How do I talk to him about this?