I think a man that I met at a dance class likes me but I don’t like him back?

I met a man at the end of a dance class. I was speaking to him and being very friendly but I didn’t see him in that way. He got my Instagram and started messaging me. I’ve been messaging back after a few hours each time and he replies back really quick. His last message to me was asking me what my WhatsApp is. I’m not sure why he wants this too. I’m just not interested in him like that. What is best to do, ignore his message or say something? I don’t want it to be awkward in the next class?

I think a man that I met at a dance class likes me but I don’t like him back?
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