Guys, I need to know what he’s thinking?

I’ve been smiling at/exchanging glances with a guy at the gym for about a month now. He waves, nods, smiles at me when he arrives every morning and will look in my direction/smile/etc. while working out, too. I left him a little note under his workout notes before I left yesterday. It said “Your smile and energy is contagious! Kindness looks great on you.” This morning, he came in, smiled, mouthed “hey” (because I was wearing ear buds). When I got ready to leave, he stopped near me and asked if I “left him the sweet note yesterday”. I told him I did. He said it made his whole day and thanked me. Did not ask my name or number or anything. Was he just being polite to acknowledge the note. I’m def interested in getting to know him. Should I just leave it alone?
Guys, I need to know what he’s thinking?
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