How do I show that I’m Attracted or Interested in Him?

there's this upperclassman guy who kind of flirts with me but I can't tell if he's just being silly or he’s into me. He talks to a good amount of women around his grade and is for the most part friendly with them. His friends were teaching him how to flirt with women in Spanish and when he learned some phrases he started using them on me. He once said something to me in Spanish and I asked him to translate it and he said it meant would you go on a date with me, and after I refused to believe that it was the true translation because he’s always messing around, he later said that he was kidding. When I stop him in the halls, he smiles at the sight of me, and he visibly checked me out today. Do you think he’s at least interested or attracted to me and how do i show that I’m attracted to him as well and express interest without seeming like I’m chasing him?

How do I show that I’m Attracted or Interested in Him?
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