Messed up situation

So I recently was sexually active with this guy and we weren’t really a thing. No big deal. Well yesterday I just found out that at the beginning of October when he was behind me he opened up Snapchat and took a video that was 2-3 snap videos Long and sent it to his guys group chat. Mind you I had no idea and just found out yesterday. He denied it and first and then admitted to taking one and deleting it but the guy who told me saw it because he was sitting next to one of the people in the group chat when this guy sent it. The guy hardly apologized and doesn’t really care. What do I do I feel sick and am so embarrassed and hurt.