Is he interested in me?

There is this guy that I think is cute but I don’t know if I should approach him because I’m not 100% sure he likes me. I have one class with him and I sit in a group with him and we don’t really interact in class but in the hallways and at lunch we always make eye contact he always catches my eye and he doesn’t look away. I want to hold it but I’m too shy, I have only been able to hold it for 3 seconds before looking away, and very recently at lunch I walked near his table and all his friends looked at me, and another time he was walking with his friends and one of them turned around and looked at me and then he turned to my crush and he also turned around too. I also have gym with that friend and they kept looking at me and I know this because we kept making eye contact, I don't know why but his friend keeps telling him that I’m around so I can’t go unnoticed. And when he knows I’m behind him he slows down. And in class my crush will keep looking at me or glance but I won’t look back. What does this mean?
Is he interested in me?
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