depression, anxiety and porn

I have been with my partner for 9 months now. I was diagnosed with depression and anxiety back in 2014. I have caught my partner on porn sites from looking at his phone history and I never know how to handle it especially already have anxiety. It makes me feel so self conscious and that I'm not worthy for his sexual pleasure.. idk what to do I don't want to seem crazy, I view it as a point of cheating almost.