Have no fear, friend! This is the first step to recovery. Your condition is easily reversible, so dont worry about not getting better!
If the problem is indeed porn related, the cure is to abstain from watching porn. Cut it out from now. Your brain has become wired to react sexually to porn and porn only. That is , you can only get excited by visual stimulation. To change this porn must be removed from the equation, and let the mind rewire itself to respond to normal sexual arousal.
Please take some time to read the material on this site or the many posts from other users who are experiencing similar problems.
Also dont forget to ask anything you like!
You have all the support you need here mate.