What do you want to hear? Honestly. I mean this in the most benevolent way possible. "It's alright bro, just do these 3 things and she'll swoon into your arms," are you hoping for that? "Just download the 'relatio' app and follow the instructions! Day 9 you'll see results and she will initiate with you and never want to leave you." Might try the app, who knows if the ad they play on social media is an accurate portrayal on what to expect. "Just square up with her and tell her what you expect and what you won't tolerate over and over. Give her as many chances as she needs to see that you're the one for her! She'll come around." Is that what you want to hear?
If she cared about you in any capacity, she wouldn't be doing the things she is doing. And if she broke a promise or something that matters a LOT to you, why in the nine plains in the hells of Mundus are you even considering her in any decisions you make? Do you value yourself at all!? If you and I both promise to not hit each other then I decide one rainy day to punch you round the mouth, you're going to call me up and say "Hey mate, why don't we play billiards anymore????" I'd hope to heck you wouldn't! DUDE!
When are you going to put some danged value on yourself? What is your honor worth? Seriously? You have her agree to something and she goes back on it! Can't you see how enabling that is? How it sends the message, "It's ok to screw me over. It's acceptable to treat me this way, because I'll always apologize to you for allowing the emotions you experience that I should have known better to control for you to get out of control."
The forum can definitely tell in no small capacity some things you've got to work on. On YOU before you go after a lady. And this lady ain't it man. No way, no how. I've allowed women to do this a few times in my life. But I refuse to go back to it. The way she is treating you isn't even acceptable to other forum members who I used to think never learn anything. If I can improve, if they can improve, so can you! This lady is only going to lead you to a life of addiction, major depression, or crime with no way out and she won't care even if she knows she was the one who caused you to go downhill that way. Is that what you want???
Look man, just answer me this honestly. What are you good at? What could you school any other dude at (obviously not EVERYONE, but I think the gist of where I'm going is self evident.)? What professional skills do you have that you can capitalize on? What are YOUR goals (not involving women, ESPECIALLY NOT THIS ONE)? How is your humor? How is your wit? What bad ass male characters on the big screen do you style yourself similarly to? Who are your friends? Who is your mentor? What young men look up to you for advice? Work on those things! If a woman hasn't shown a keen interest in you by the time you can answer all of those questions with a story behind them, I'd swear you don't live on earth!
The common denominator to your problem is HER. Mathematically, what is the next obvious step to solve the equation? You know it, I know it, SHE even knows it. You cutting contact with her for good probably won't even phase her. And if it does? It's not your fault she's a case study in abnormal psychology. And it's DARN SURE not your fault that you value yourself enough not to placate to people who gaff off on promises!
Do you want us to tell you to keep trying with this lady as we rub our palms together with sadistic glee? To place side bets on what she does or on what you'll post next? Why are you here? For therapeutic release, or to actually improve? If it's the first I'll cut you a break. If it's the second, I'm done. I'm saying this with as much of the spirit of kindness as I know how. If you continue to post about this one girl and don't do better by yourself, I'm going to be valuing MYSELF and my time enough only to offer my advice and knowledge to those who want to learn.