Photos and lack of attention?

Me and my bf of over a year and a half have been having sex for a while now and we don’t shy away from sending photos... normally. Ever since quarantine started and we rarely see each other in person he’s stopped sending photos and stopped wanting to do stuff on FaceTime. I don’t want to pressure him but we’ve had four separate conversations about it to see if he’s just not in the mood or whatever or if he’s uncomfortable but he’s says nothing is wrong. I don’t understand if nothing is wrong, then why isn’t he as thirsty? And why isn’t he asking for photos or (sexy) FaceTime calls anymore? He’s not even asking to SEE any thing anymore. He loves me a lot and we still have sex but that’s at most once a week... I just don’t know what to do. I don’t feel like he’s listening to my needs but I can’t pressure him into sending photos of himself. (He also, for the record says he’s not insecure and doesn’t find himself overly unattractive so that’s not it either??)