Hey man,
I've read your thread and had a few thoughts about it. Firstly I want to emphasize that is in no way beneficial to feel guilty or bad because you PMO'd. It happened, it sucks, you'll feel bad about it but the more you beat yourself up for it, the harder you make it on yourself. Stopping this is hard enough as it is so instead of beating yourself up for relapsing more often, try to put it in perspective with your situation two months ago and notice that it is getting better. This just takes time.
I think this might be a good read for you: http://yourbrainonporn.com/top-3-fatal-mistakes-rebooters-make
Also, sucks about the girl, but it happens. Good for you to cut it off if completely if you've had feelings for her. I personally wouldn't mention the porn addiction / no PMO thing until you've been in a relationship with a girl for a while now, I'd find it understandable if someone would be scared off about that if they're just getting to know you.
So with that in mind, best of luck tomorrow and the days that follows. Congrats on your progress so far.