Porn addiction

My husband is very much addicted to porn videos....in my absence he always check nude photos and videos of girls.... And he is not interested in me too.. Our sex relation was only good during our first month after marriage... But still he was looking for these videos...even during our honeymoon trip i found in his history list searching for "call girls".. Why he is like this????? on the other days I was behind him begging to fulfill my needs....he is crazy about nude videos of girls...am very much depressed due to his behavior ...please give me a solution...