we have sex once a month but he watches porn 3-4 times a week (we had a conversation a few months ago)

I asked him the other night why we hardly have sex any more. He said he's just got a really low labido.. I don't know what to think. He turned me down last night and I caught him in the shower today. We live together and I needed to brush my teeth, normal for us. I just don't know what to think anymore...