How to tell if your teacher is flirting with you or just likes you more than the other girls?

so my teacher is 28, and I'm 18, I'm a returning student and my teacher enjoys making fun of me and bullying me! it never hit me how he acts towards me until one day we were watching a movie in class and I saw these sharp white eyes staring fr a good min, then I looked to see and he was looking right t me, I looked away but could still see him looking! also today was another big thing we was talking to me and 4 other girls and he was only looking at me, also he keeps saying that I should come back after I graduate, and I reply "sir you were at my grade"him "no you have to leave the school for good, so I can beat you up"he doesn't talk like that to the other girls in my class. and the reason why I think this is flirting because that's how I flirt (punch, make fun, tease) and I can't explain the way he looks at me with these slow eyes! I feel like he take along time to look away also I have seen him look at my chest more then once!

How to tell if your teacher is flirting with you or just likes you more than the other girls?
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