She joined a gym and he became her personal trainer. They worked together 3 times a week which was plenty of time to develop crushes on each other. One night, she ended up at a bar downtown and he walked 16 blocks to meet her there. That same night, they spent hours sitting on top of a flight of stairs that overlooked the city talking about anything and everything. The rest was history.
He booked an escape room for both of their families to do together. She was the designated person to read the clues. The very last paragraph of the last clue said, "now turn to the one you love, he now holds the key. You will find him on one knee." So she turned to him, and after a few moments of happy tears and catching her breath, she managed to say "YES!"