No sex with partner but caught him looking at porn.......?

I posted a question last week about my partner and I (in our mid 30's) and our lack of sex life (3 times in 6 months), we have been together for two years. My partner said he'd lost his sex drive and that he thought it was due to health problems and that he still loved me but just didn't feel like sex. I used some of the advice given and tried to talk to him again, I assured him that I would stand by him and support him. However, last night I caught him on a vile porn site (much older ladies) and he reacted with aggression and anger-he said that he had to use porn as I disgusted him. He packed his stuff and left. I'm feeling so lost, heartbroken and bewildered. It's like a kick in the head, was he just ashamed of being caught or am I wasting my tears on a guy who never gave a damn anyway?