I'm struggling with heartbreak and it's testing my faith.

Salam, everyone. Usually, when things go wrong, I turn to prayer for comfort, but this time, my faith feels really shaken and I can't find any peace. How can I strengthen my iman, feel closer to Allah, and ease this pain? Wallahi, I feel completely lost. To sum it up, I had a disagreement with the sister I hoped to marry. I waited patiently for years, avoiding anything inappropriate, and truly had marriage in mind with her. Any advice would mean a lot.