My dark experience with my partner

Me and my boyfriend with his friend and his girlfriend planned for a trip. We booked a homestay with two bedroom. We enjoyed whole day travelling. Then later at night we drank so much wine we came back at our rooms. Me and my boyfriend decided to have sex. Mistakenly we forgot to locked the door. While having sex his friend secretly recorded our video. We had no clue. Later few days his friend showed me the video where it can be seen iam completely naked. I asked him to delete the video but he refused to delete it. Asked me to give him blowjob and he will delete the video. And if I tell anyone he will share the video all over the internet. Iam scared to tell my boyfriend. What should I do?