Husband into porn and masturbation, but not me

I have been married for 4 years now and my husband is very heavy into pornography. He masturbates on a daily basis and doesn't care to have sex with me. I have talked to him about it and he said that it's an addiction. I told him that it hurts me deeply and I have been tempted to cheat on him. In other words, find someone else. Anyway, what do you suggest? I have tried to interest him more by using sex toys, sexy clothing, oral sex, etc. I am an attractive person and a lot of men flirt with me but I just ignore them. I work out at the gym. I asked my husband if he was interested in someone else and he told me no. He works a lot but when he is at home he just wants to watch TV and sleep.