I Need Help/Advice

I have an addiction that I've been trying to get rid of. I am a porn addict and I desperately need to stop. It started when I was a teenager (I'm 24 now) and I was able to quit for a few years and then a couple years ago I started again. My husband doesn't know about it. I love him so much and I don't want this to addiction to continue. I really don't deserve him. He treats me like a queen and here I am with this devil on my back. Have any of you gone through this? What did you do?