Is my teacher flirting with me or am I overreacting?

ILoveChocolatey
Okay so i have a feeling my gym teacher likes me.. Sometimes i catch him looking at me from a distance and he usually jokes around and teases me. The other day he playfull hit me with this thing he puts around his neck to hold his keys.. I kind of looked at him weird and he just started laughing. Sometimes he playfully pushes me with his arm when i get a question wrong and After school he runs tennis club and usually i go because i have to practice. Today one of my guy friends told me that 'its so obvious he likes you! He's been with you the whole time and not with us' later on i went up to him and told him that i was hungry and couldn't wait to get home so he pulled out a packet of biscuits and gave them to me.. Later on i caught him gazing at me and smiling. He also usually initates conversation with me and asks me a lot of questions and ALL the girls go crazy over him because he's so attractive. I don't see him act like this with other students and its only me.. by the way i'm 16 and he's in his early 20's what the hell is going on here? Am i reading too much into this?
Is my teacher flirting with me or am I overreacting?
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