She was putty in my hands. Giving me all the IOIs I'd ever want. Unsolicited texts telling me she's thinking of me, phone calls that she initiates, etc. Her busy schedule kept us from seeing each other regularly and instead of focusing my mind on presence I let myself construct an imaginary situation and fell victim to the negativity I planted there myself. I was totally wrong and acted the fool. Instead of keeping a level head I walked out on a date during an awkward negatively charged conversation.

Now she doesn't want to see me. "She's done." She's put up her defenses and doubled their reinforcement.

How can I crack the wall? What are your best defense crushing moves?

Please don't tell me about oneitis, this is not oneitis. I am capable of walking away, and fully realize that I may just end up doing just that. Instead I'm going for the gold. If it doesn't work out then fine but the spark was there despite never having it become fully realized.

TL;DR: Things were working out, but now they're not. Techniques for getting back into her good graces?