He is not a friend. We might have fondness or physical attraction towards our friends. If we respect them enough, we should never exploit their trust like this. Both as a civil person and friend, your 'friend' is clearly unrepentant, perverted and criminal.
He is probably having them uploaded and exchanged in some pervert sites, your upskirt images or video for likeminded pervert to wank together with the invasive images of victims like yourself.