Seeking Guidance on a Manner of Dua I Made

Assalamu Alaikum, I’m dealing with something and could really use some advice. There’s a sister I really admire for her personality and how maturely she handles things, though I've never seen her face since she observes proper hijab. She’s also been struggling with a physical illness. About six months ago, during a moment I now realize wasn't wise, I made a dua and promised Allah (SWT) I would never express my feelings or propose marriage to her if He granted her a cure. Reflecting on it, I know Allah doesn’t need our bargains-He is Al-Qadir, capable of all things-but I still made that pledge out of emotion. Now I’m seeking clarity: is it permissible to retract or reconsider such a promise to Allah? I really want to understand the Islamic perspective so I can decide what’s right. If I must uphold it, I’m prepared to accept that, but I feel genuinely stuck. Jazakum Allahu Khairan for any insight.