Is he flirting or just making fun? (Pls read details)?

Anonymous
I completed a small task given to me at college and this one year senior guy kinda mentor said "You're awesome". I took that as a compliment said thank you to which he replied "I'm just kidding, you're not awesome". Is he making fun or flirting?
Is he flirting or just making fun? (Pls read details)?
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