Ok, I'm a bit tired of all these "you fucked up" posts, so I'm going to try to give some advice. I'm no expert but there are a few bits of "wisdom" I've figured out of some relationships I have had.
Now, take this with a pound of salt. I could be 100% wrong, any of the stuff I say here is at best anecdotal, and at worst terribly misinformed.
Here it goes:
#1: Lovers aren't friends. Friends aren't lovers. People can be friends, and not lovers. They can be lovers, and not friends. They can be friends and lovers (hopefully if they intend to stay together long).
Sounds like a one-liner (5-sentencer?), so I'll elaborate. When I was dating this girl a few years back, we went out for a few months. She broke with me out of the blue. Then started pestering me on the cellphone and so on, begging to be back together. Then we did, then she broke again. Then pestered me again. Then I threw my phone to the garbage and got a new number.
She said to me "I just wanna be friends." And I felt enlightened. I replied to her "we can't stay friends. Not because of this shit, but because we have never been friends. We weren't friends before we hooked up, and certainly we haven't been together long enough to become friends."
Now, I don't know if that's your case (maybe you knew her long before hooking up?) but I thought I would bring it up. With luck, two lovers will become friends over time, more so if they're going to get married. But don't confuse hanging out with someone because you have romantic feelings, with hanging them because you're buddies. You have (I assume) buddies you hang out to play games, have a beer, do sports, whatever. The activities/interests often aren't the same. Don't get obsessed with the idea that since you've been together, you have to "stay friends". Think of friendship and "lovership" as two separate, but not opposite, number scores
#2: Positive action. Cut that out. Seriously, stop it.
I'm not going to agree with "cut her from your life forever". Just leave her be. If she's actively contacting you is because you expressed interest in that. So yeah, she's going to nag you because you don't contact her despite saying you wanted to. Maybe you said "let's be friends" to spare her feelings or something (most people do) and didn't mean it, or maybe you want to but think it's hard or impossible (for good reason).
She's going to keep doing that until you just tell her to stop (because you kinda started it). So just find a way to tell her that you should just break for good and let things go their "natural way", and if you just happen to stay friends then good. All this "try to stay friends" "positive action" is even destructive. It's not going to end well. Try taking no action at all, and talk her into trying the same (I can't say how, I'm not that good with words, "in a good way" I guess covers it?).
Not saying avoid her like the plague. Maybe your friend circles won't allow that? I don't know. Just stop pretending you're still a couple or buddies or whatever.
Again, I tried to keep this message free of judgements of who was wrong or who fucked what. Definitely, your initial posts show a kind of cluelessness that obviously seem to have angered some posters here. I think you've clarified your issues better on the latter post, so I'm not going to "take sides". I hope my advice is good and not fucked up. Cheers.