Guys, What does it mean when guys show interest then avoid you?

I am a professional dancer and recently ran into a guy whom showed interest in me by saying hi while rehearsing for a show we had. I acted coy like I didn't know he was interested because of just had gone through a break up. He’s liked by many girls in the community but I didn't give him the attention that most girls would give him. Some of the female dancers that like him saw him checking me out and gave me snarky looks but I ignored it. After some time, i DM’d him on Instagram to ask about his dance classes in which he told me he did teach and inboxed me again on another day to invite me to his class but I was on vacation so I said, “ So sweet. I would love to come but I am on vacation. Thanks for the invite!” I never made it to take his class ever. We recently ran into each other again and it’s been a while since seeing one another. We didn’t say hi but he was staring and stealing glances. I should add that I am curvier since the last time we saw each other. But He was wiping the sweat off of the dance floor so we didn’t slip but he was purposely wiping right in front of me. I know It was on purpose because no matter where I was in the room, he would be right there wiping. I still Acted coy but I peeped. The last time he did it, he caught me looking at him while he wiped, we locked eyes briefly and I looked away from pure shyness. He couple danced with the choreographer as they collaborated on sexy choreo for social media and avoided me when I would walk by him after class as I mingled with other dancers like he was afraid I was approaching him. What would possibly cause a guy to behave this way given these circumstances?

Guys, What does it mean when guys show interest then avoid you?
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