Is this normal? ((TMI))

Ok so my husband and I have been together for about 6 years but recently he complains that he is to tired to have sex with me, I even offered to give him a bj (which he says he loves) and he says "I'm so tired to do anything" but yet he is never tired to watch porn and do it himself, it makes me feel so unattractive, do you guys think it's me that he just doesn't want to do stuff with me, or is this normal? We only have sex about once or twice a week yet he can do it himself with porn every day even more than once...