Did he lie??

I went into my room last night after I got off work and my husband had just left for work. I laid down on the bed and noticed that both of our pillows were piled on each other. The tissue box was also on its side and not up in the corner where it normally is, but where my husband normally lays. When he is awake he usually doesn't go back to the bedroom, he stays in the living room. I asked him if he did and he said no, that he laid there because of his sunburn. I want to believe him, but I just have a feeling he is lying and was watching porn again and jacking off. This normally would not bother me, but he has activley been denying me sex lately. He doesn't even look at me when I get naked in front of him and he doesn't want to even touch my breasts. He use to love to play with them all the time. Do you think he lied and was jacking off?