Tell him its good he deleted some pictures but this is sign of an abusive relationship therefore you don't want to subject yourself at all. 3 out of 5 women are abused in some way. My oldest daughter who's 15 has convinced 2 of her girlfriends to get help from the principal /counselor, because they've both been emotionally blackmailed. One said he's tell everyone what they did sexually and the other one shared a nude body part and he was threatening her with that.

It he doesn't stop insisting on this, you may have to get a restraining order on him. Make all your passwords complicated with capitals, lower case, numbers and symbols. You have a right to live a peaceful life and I hope you'll find a nice young man one day.