Boy trouble

There’s this guy. He’s much older than me ( like 6 years older) and I’m not sure if he likes me. He comments on if i get new clothes ( like a new shirt or pants). If i walk by he will smile or wave or ask how my day has been going. It’s just so weird because he is so much older than i am. Please give me your opinions below on if he likes me or not and how to be more appealing if he does. He’s 18 by the way and is super hot!