I have a crush on this guy. How to know if he's interested, but we never talked to each other, but always make eye contact whenever we see each other?

He is 1 year younger than me , and he is not in my class. He always make eye contact, not me. I always look away and act like I don't give a shit😶 attitude coz I'm introvert and I don't know how to approach. But lol I've had a crush on this guy for a long time. He is such a cutie. how to know if he is interested or not?
I have a crush on this guy. How to know if he's interested, but we never talked to each other, but always make eye contact whenever we see each other?
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