Wow, thanks everyone, what a great and inspiring bunch of replies

I haven't touched anything since before my initial post. I have started praying my Rosary and Little Office throughout the day like I was before I starting messing up, as well as a lot of other things I probably won't go into.
My last relapse actually took place on my first day of Preparing for Consecration to Our Lady. I brought this up in confession of course and talked to the Priest about it. I was tempted to put off the consecration because of what I did. It struck me that yes, I messed up big time, but it's obvious that the devil does not want me to go on with the consecration. But Our Lady wants it - no, demands it. More on that in a sec...
As to why I ever started, I was a very nihilistic person. There was never a question of "this is bad or wrong" or "what will I do in the future?" I spent my time as a teenager drinking and doing drugs with ex-convicts, isolating myself for long periods of time, and trying to destroy myself. It was an escape at first, and then I had to use to function as I became an adult. Couldn't do anything without it, and more than not if I had enough I was unable to function. I believe that I was heavily oppressed by the diabolical. To put it lightly.
I am a very recent convert. I was raised in a very loving and strict family, and they did everything they could to help and support me, and eventually by a special grace I was converted after reading Story of A Soul and saying the Rosary daily. I told Our Lady that I would consecrate myself to her, and so far I've put it off. And so it's about time. I'm in the middle of the initial 12 days right now.
Prayer...penance...mortification...
Thanks you for your prayers and insights