How do I delete pictures from Snapchat without the other person immediately knowing.

DISCLAIMER: Everyone mentioned in this story is 18 or older

For reference I am F18 and want to break off a relationship with M18. We have sent explicit media back and forth. (I know it was a stupid decision and I wish I could go back in time and stop myself, but that’s not the point) I have already unsaved as many explicit media sent by him as possible, since he saved said media as well. However, I want to delete all of mine without him knowing. Luckily my face is not in ANY of them. However, someone who knows me and my house could confirm it’s me (At most 4 people who I have mutual friendships with) I want to break it off as soon as possible (within a week). He is not a bad person, we are just not a right fit for each other. In disagreements or tense conversations he blows up at me. I would like to believe he would not use the explicit media against me when I end things but I just don’t know. Is there a way I can delete all of my media at the same time or no.