He broke up with me because i won't send nudes

So my boyfriend broke up with me today because I refused to send nudes. I have sent him nudes in the past but I didn't want to do it anymore. He kept insisting I send him a nude , but I refused and he said that I did it in the past and there isn't anything new. I still refused and sent him videos off the Internet that I thought would help him understand that I didn't want  to send him any , but it made things worse , I asked him to imagine a guy doing what he was doing to me to his sister and things escalated from there and he broke up with me. To be honest am relieved it's over 🤗🤗🤗, but I was wondering whether to ask him to delete any pics he has of me and how to protect myself in case he decides to put them on the Internet ,