What do I do?

I have been in a relationship with my boyfriend a year and 1/2 moths. One day he found a picture of my ex in my phone and he got mad about it. I deleted all the pictures of my ex. Is been a year and I found a USB with all the pictures of his ex's even nude pictures. He even add some picture of me on that USB(but not nude I don't let him do that) I got mad and deleted all the pictures of me because I was angry what do I do? Do I tell him or not