Bebop, I can so relate!
I went through this with my ex husband the last year of our marriage. For 10 months there was no intimacy in our marriage what-so-ever. I would often catch him masturbating to porn. I felt I was not only physically, but emotionally deprived. It led me to have an on-line emotional affair. I admit it was wrong in my actions, and I'm not justifying it, but it did help me cope in a very difficult situation.
I'm not sure what advice I can offer. Maybe try and introduce a new scenario in the bedroom? Role playing, games, new lingerie, a vacation? Don't forget guys are very visual sexually. Sometimes they need to be "shown" what we want rather then told, if you get my drift. I hope that didn't come across as I'm blaming you at all or that you are responsible for his actions towards you. Just thought I would add a different perspective.
I hope things start going the way you want them to! =)