Why is being the teacher's pet bad?

So... a follow up question.
Since the begging of the year and I'm told I'm the French teacher's pet. (Aka the favourite or preferred student of a teacher)
And... yeah I have to admit it:
I hold her bags for her, open the door for her, buy stuff for her, erase the board for her, always do my homework, always calm, compliments her, tells her goodmorning, bye, I will miss you etc..
She does treat me specially too.. stays with me in break time to examplain to me, tells me I'm pretty knowledgeable, polite, gives me extra papers she doesn't give to the class, tells me to take pictures with her etc..
She is pretty classy, polite, kind, doesn't shout, doesn't punish... and the class abuses of this. I don't.

She's that kind of women that are too emotional and feminine, EX I said:"I'd really miss you when in vacations"
She said:"aww thanks you! That's so sweet"

So... I'm not her pet out of nothingness, it's becasue the rest of the class are ***holes
Why is being the teacher's pet bad?
Why is being the teacher's pet bad?
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