Made me feel stupid about myself

Just yesterday I seen how much porn my bf was watching I usually don’t care but for some reason it made me feel a certain way because the day before we had an argument and I left the room and he was watching porn while we were both mad. Anyways he told me he’s been watching it because he said I don’t fuck him like how I used to. I was in shock just the way he told me. I started crying because I felt so pathetic about myself. The fact he didn’t even tell me till way later and I asked how long has he felt this way and he said a couple weeks. I feel so ashamed and stupid in myself it’s not like I’ve changed anything. Im starting to overthink I’m bad and stuff. I’m still confused because he never said anything so this whole time he’s been feeling this way. I feel like crap today I just feel so embarrassed.