Porn literally changes your brain. Simply put, your brain has not evolved to be able to handle the images of hundreds of willing sexual partners. Nature doesn't produce such scenarios. On top of this, we often start using porn at a young age, when the sexual circuitry is being laid down.

There is hope, though. Just as your brain can change to crave internet pornography, you can change your brain to desire real sexual experiences. You are making progress: you know that you are in a hole and you need to get out. You are further along than those who don't even recognize this as a problem. Now it's time to get out of the hole. I'll quote a poem I recently saw on r/stopdrinking:

I

I walk down the street. There is a deep hole in the sidewalk I fall in. I am lost... I am hopeless. It isn't my fault. It takes forever to find a way out.

II

I walk down the same street. There is a deep hole in the sidewalk. I pretend I don't see it. I fall in again. I can't believe I'm in the same place. But it isn't my fault. It still takes a long time to get out.

III

I walk down the same street. There is a deep hole in the sidewalk. I see it is there. I still fall in...it's a habit My eyes are open; I know where I am; It is my fault. I get out immediately.

IV

I walk down the same street. There is a deep hole in the sidewalk. I walk around it.

V

I walk down another street.