my gym crush disappeared

I (f) would normally go to the gym late evenings. I would often see a guy there around the same time and we would work out near each other. I always thought he was attractive and caught myself looking at him and wanting to compliment the scent he was wearing but he always seemed to himself and we never made eye contact. I stopped seeing him for a while and then began going in the mornings to where I ran into him again. I must have been getting there as he was leaving because i would run into him for a second and he’d be gone. One day we crossed paths and actually made eye contact. I was on a machine and noticed him lingering around. Once I finished my set (also fighting for my life because my glutes were on fire) we walked past each other and he gave me a head nod while I gave him the most awkward smile back. I haven’t seen him since and have a weird feeling he’s changed gyms. I’m also moving cities in two weeks and can’t fight the feeling that I really want to see/approach him before I’m gone. What do I do??