I fell for a girl

I fell for a girl. Though she never knew about it. She was beautiful in my eyes. Her skin was dark, and I loved gazing into her eyes. She didn’t smile often, in fact, she was usually serious. but I loved her both when she smiled and when she was stern. She worked at the gym.
I wasn’t a sporty person, but I signed up for the gym just to see her. I kept going until I figured out her schedule: Saturdays and Wednesdays at 6 p.m. I went regularly until I injured my leg and had to stop, but I missed her terribly.
Desperate to see her, I began waiting from afar just to catch a glimpse of her leaving the gym. It was winter, and I got sick several times from standing in the cold, but I didn’t care.. seeing her made it all worth it. Then one day, she stopped working there, and I lost her.
I kept wandering near the gym, hoping to see her again, imagining every person as her. My heart would race wildly. I loved her so much it made me sick.
We had a few encounters before that. She was polite, strong, and firm. I admired her for those traits and so much more. I cried a lot because I couldn’t be with her. It was complicated.. I knew I would break her heart if I confessed, because I couldn’t be with a girl, and I was about to leave that city. I carried her as a bittersweet memory in my heart.