Just because he watches porn and gets his from it doesn't mean you don't meet his sexual needs and never will. My fiancé and I sometimes will watch a porn together to get in the mood to have sex. Other times I will be horny and my fiancé not be here and rather than cheat I watch a porn and get mine till he gets home. Porn is natural stop beating yourself up over him watching it. Try watching one with him it may help your sex life get back to normal.