I'd seek professional help.
You Might claim to be happy now, but you may wake up one day and be sad that this addiction has cost you relationships that most people crave and eventually need in their life...ie. having a wife and child. If its so bad that you don't enjoy sex anymore...then yeah its a problem. Because sex is awsome, and a lifetime of solitude with your hand isn't healthy for you socially and emotionally. Even though it seems like a "fun" addiction, no addiction is EVER good for you. Especially when it keeps you from running a normal life.
But yes, the BS flag is coming up for me too, but...ehh who knows. I'm sure some people take it to extremes, just like with anything...so yeah.