Is this reversible? Should be taken?

Hello Dr., I'm writing this in the Mental Health category because I feel that it has something to do with my mind. For the past 5 years I have been suffering from porn addiction. I used to watch porn on a daily basis, sometimes more than once a day. I first started with normal porn content and gradually I started switching to more extreme/fetish kind of porn. Now, whenever I try to watch porn or think of a girl I don't feel the same excitement as I used to feel before. In fact I don't feel any mental excitement at all. Due to this I'm even unable to get and maintain proper erections. I understand that erectile dysfunction could have physical reasons as well but I don't see how it could be a cause because I'm just 23. I am perfectly healthy physically and I exercise regularly. My blood sugar level is also within normal range. I'm really worried & this is causing me a lot of anxiety. Will I get back to normal again or is this irreversible? What steps should be taken? Please advise.