My husband and i went through the same thing.  At first i thought it was just a once in a while thing. But i would find more and more p orn on the computer. It got to the point where  he would be sitting and watching porn for hours and hours. He would lie to me and claim that he wasnt porn surfing but yet i would find it. It finally got to the point where i left. I know exactly where you are coming from. How often does he look at p orn? Does he cover his activity up? He might be addicted. I wish i knew exactly what to say but with every case its  different. Just keep talking about it. Keep the lines of communication open. I hope this helps.