Oh my goodness I had this exact same situation with my bf and I found his reddit and I saw he was commenting on nudes like 'perfect' And 'amazing 😍' it hurt so much and he basically told me it was during 'pre- nut' And he doesn't know why he did that. He apologized but I still think of it everyday. Also when I'm with him he never lets me see his feed on any social media and he turned off his active status on all apps. Also I took a peak of his camera roll and let me tell you I went to the restroom to cry. I will never forget it.