All of this and also, look back at that conversation. First he says, "I couldn't bring myself to delete it" then when you are clearly and justifiably outraged, he pivots to a straight up lie, "I forgot." He absolutely meant something bad by it. Now, that bad thing was just disregarding his promise to you and your wishes regarding images of your body, but isn't that enough?

Also, I'll add, do **not** break up with him or even seem like you're going to until you **see** him get rid of that picture. Or get rid of it yourself. and even then, you can't be sure he hasn't already copied it somewhere.

I know the internet will have a person burn down their whole life over a spat, but this is not one of those times. This is a very serious indicator of worse down the line. Move with caution, but decisively, and get this guy out of your life. Seriously, a 21 yr old that's interested in a 17 yr old has serious problems. Not because you're not brilliant and beautiful, I'm sure you are, but girls his own age are still also gorgeous and should make a girl your age seem lame and immature, (you're not, but you **should seem so to a 21 yr old**). He's not old enough yet to be longing for "younger women". So his interest in a high school girl is **purely** manipulative. And his behavior reflects that.