AIO for feeling uncomfortable when my mother kisses and sniffs me?

I'm 17F so it's no surprise that my mother still sees me as a baby, and I've tried to be understanding but her behaviour honestly weirds me out so much.

She works long hours to provide for our whole family and when she comes home she'll immediately come to kiss me on the lips and sniff me, calling me her "dopamine".

Like even when I haven't washed my hair for a while, she puts her nose on my scalp and takes a deep inhale. It just creeps me out at this point.

I've pushed her away and told her to stop several times but it doesn't matter to her. I literally even said to her face "We need boundaries". But she just pouts, kind of acting like a baby, saying it's just because she loves me so much.

Shes a full-time nanny so she's around babies all the time, which may explain her childish behaviour. I love her, but to be honest it annoys me that I don't have a mother that I can really respect.

Am I overreacting?