my husband is a discutes to porn?! help!

My husband and I haven't been having sex as often, when I try he just can't get aroused. I went through his phone and found out he's been watching porn (after I've told him it bothers me) and he lied and lied over and over again denying it. Then he disclosed me me that he's been addicted to porn since 13. Please someone help, we are newly weds and I've already been through being cheated on. He has a special "fetish" for bbw and Brazilians with huge asses (something I don't have)- part of me feels betrayed and disgusted because I feel like he was dishonest and part of me feels like I should get him help. Oh- I also found this meme in his phone and I feel like he's mocking me.