How do I approach a guy after it sounds like I rejected him?

My hallway crush, lets call him Steve. A couple days ago, his friend said that Steve thinks I'm cute and asked for my snap to give to him. I dont have a phone, so obv no snap, but i do have insta. I said "Sorry I don't have a snap" and was about to mention instagram but Steve said "Nah thats fine" and we all walked away. Ever since then, we've been making hella eye contact in the hallways. Also, I know that he's awkward when talking to girls so that might affect this. Today my friend convinced me to text him through insta. She said to reply to his story saying "heyy" so i did. Now almost 12hrs later, he hasn't responded. My guy friends that was a bad move and he might think its creepy. What do I do?
How do I approach a guy after it sounds like I rejected him?
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