You know what; I would go out and give you loads of advice - but let me literally demonstrate the effectiveness of the freeze out with a short, few word story of my own.
I had one-itis. Bad. I was like - in love with this girl, but we were good friends. Pining over her for 2 years or so? Yes. As AFC as it comes. We spoke everyday on msn, I used to talk to her in school but had huuuge confidence issues talking to her and just used to blush, chat shit and the such. It was awful.
One day, I wanted to turn my life around, my shy ways and anxiety was taking over my life. This was before I even came to this forum or heard of PUA (I'm here to pass on info and tighten my already existing natural game, which I developed in this period.)
I tried to make radical changes in my life, and slowly did my own created social excercises to improve my confidence. One of the main things I did? I totally froze her out. I made a stonewall decision to not talk to her anymore; I was socially inept around her and could never get with her? And she was linked to my previous anxiety...so why go back there? If I want to be a new guy - I need to cut my ties with everything that brought me down.
A few months passed pretty much, we said Hi now and again, but I froze her out. A few times she asked If she'd done something. I said no, and made small talk...but didnt really chat. Heres the first interesting thing; I actually lost interest in her. I actually became less attracted after I dropped the infatuation.
My life was on the up; I became hugely sociable through my own self-help, putting myself out there and practicing (one day I plan on teaching what I did. I'm proud of my achievements to this day.)
I was going out. To parties and the such. I was getting to the stage where people I didnt know (or at least remember

lol) would come and chat to me because I'm 'its that guy!!'
After a while, (8 months to year) one day we chatted a bit on msn. She said she'd missed talking to me, and flirted with me slightly. I just laughed it off.
Bumped into her one day, and again, had a long conversation. My fear was gone and I chatted to her, flirted made jokes, hugged her and made my way.
We then chatted on msn...and something happened. IOI's...flirting up a notch. I was like..."what?!". This girl I'd pined over for so long and given up because it would never happen, was sending IOI's, and not treating me like a puppy dog friend. This maybe the answer or destination your waiting for...but here comes what I think is the better lesson.
I didnt follow up these IOI's. I flirted, but I just remained a distant friend. Why? This new guy could get others. I didnt want her anymore...I'd work so hard to get away from the oneitis anxiety...why would I go back to something that was linked to that past life? I didn't need it. There was plenty of girls out there. Fall off the horse? Theres a billion more.
Thats what I think the true aim should be. The freezeout of that oneitis girl could be the start to pave you on to greater things.
If your on the friendzone...move on. Simple as.
Hopefully my story more than helps with your problem, and anyone else reading. Feel free to link.
Riot!