Chronic, er, self-pleasure issue. Would appreciate some advice

This issue has plagued me for years, and I feel that I'm beginning to lose control over my life and finances because of it. Therapy is something that I would like to undertake, but the embarrassment of the situation is keeping me from getting the help that I need. My situation is as follows: For many, many years now I've been a committed, chronic masturbator. Just admitting that now brings to the surface feelings of shame and frustration, but that's what I am. It's evolved from something I derive please from to being a form of pacification. Whenever I'm stressing out about something the urge to wan takes over. I'll stay off the sauce (ew) for a day or two then I'm back on with a fury, busting out four or five charges in a day. I'm the sole accountant at my office, so I can stay late and enjoy myself without fear of interruption. But it's coming at a cost. I haven't had sex with m girlfriend for the last few weeks- I have neither the desire nor the energy to devote to more sex. Just like an alcoholic (or any addict), I've resorted to lying to cover my tracks, making excuses for staying out late. Even worse, my penis is beginning to show signs of abuse. The color of frenulum resembles a uncooked steak, which makes me further avoid sexual contact with my girlfriend, which triggers more anxiety and further bouts of masturbating. To complicate this even more, I regally pay for online porn, and the costs are escalating. I'm becoming a fucking mess and I find my thoughts drifting over to the 'final solution' more and more. I despise myself for being so broken. Has anyone else ever had this kind of issue? I'd truly appreciate any thoughts that any of you might have.

tl;dr constantly yanking my pud is ruining my life.

Edit- I can't make any more spelling corrections. Re-reading this makes me want to sob. Sorry, bear with me.