I just gave a guy my number on a piece of paper at the gym and I’m nervous about him reaching out. He seemed busy when I approached. What can I do?

He was staring at me before but kind of stopped probably because I didn’t reciprocate. He complimented me a few times.
Anyway I just decided I’d write him my name and number on a note and give it to him today. It was just this evening so I haven’t heard just yet. What usually happens in these scenarios?
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He’s told me I’m gorgeous and that he likes my hair before. So I don’t think he finds me ugly now or anything. I am just awkward and shy is all.
I just gave a guy my number on a piece of paper at the gym and I’m nervous about him reaching out. He seemed busy when I approached. What can I do?
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