I have erection problem from 1 year.

I was doing masturbation from many years. And I used to masturbate while watching porn. I do that every day from many years. I also tried to do masturbation without porn and I successfully did it. While watching porn I try to delay ejaculation so I can watch multiple videos and I enjoy that. Now I am married and when I try to do intercourse with my wife I failed. So I tried to do like masturbation I was imagining about other women which I imagine in masturbation but I can't get that stimulation which I get in masturbation. So I can't sustain my erection because it's not stimulate me. So I loose interest in sex(But not in masturbation). Now whenever I try to do sex with my wife I always thinking about erection. It will come or not? Because of this sometime I can't get erection or I loose it when try to penetrate. I get daily morning wood. And it sustain without any stimulation. I am physically fit and active and take good diet. Pls Help...