I'm going to offer up advice based on how I roll, which may be completely off base for the chicks y'all are talking up.
Friend zone or not, if a chick has any interest in you, there's always an opportunity to relocate from the friend zone to a warmer region down south, but it all depends on timing. If the chick you like is actually worth her salt as a friend, she will shy away from the idea of a romantic relationship with you, because she values the friendship too much to risk it. With that said, the number one thing you shouldn't do, is tell her how you feel or talk about having a romantic relationship with her. Asking results in a yes or no answer, and as long as she's clear headed and in control, she'll probably say no.
If you've already breached this topic with her before, she either told you that she loves you as a friend but doesn't feel what you're feeling, or she really likes you but isn't willing to risk the friendship. If she gave the first answer, be glad that you have her as a friend and start looking elsewhere for your future girlfirend/wife. If she gave you the second answer, move on to the next steps...
Here's what you do:
Even if you're in the friend zone, if the chick digs you, she probably makes it a point to hang out with you a lot. When you are hanging out, start doing the things that make you good boyfriend material: tell her she looks smokin' hot, open doors for her (car door too), pay the check or cook her dinner to save non-existent money, pay attention to her instead of scoping out other bitches, listen to her and try be sensitive to whatever she's yammering about (work, school, guy she likes, etc...), watch a movie she wants to watch, I could go on and on. With that said, don't turn into a total pushover...
At some point there will come a time when, if you were on a date with someone, the moment feels right to make a move. This is where I agree with Mountain, make a move! You want to catch her at a moment when she's wishing for prince charming to put his arm around her and start getting cozy. I'm not sure about other chicks, but watching a movie on the couch is pretty much always a green light. If she lives alone, stopping by later on a weekend night when she's in PJs, eating icecream and feeling lonely might be good timing too, depending on the girl.
The idea is, you need to build the sexual tension without scaring her off. You also want to start a physical relationship by taking advantage of the primitive female desire to feel protected and make babies (without actually making babies
), in a way that seems spontaneous so she has no time to think about it and talk herself out of it. Once all of that has happened, behave however you always have with her as a friend, but be a little nicer and show a little more interest in her so she knows that nothing has changed with your friendship and that you are stand-up dude, boyfriend material as well.
Good luck!!!