He always calls me "little girl" - is this weird?

The guy I have been dating always call me like that, almost in every sentence "Good night little girl" "I have to go, little girl" "I really like you, little girl" and I was wondering if is becasue I look young or innocent. He is just 2 years older than me.

I know I am overreacting but I feel like is something that you say to your little sister.
He always calls me "little girl" - is this weird?
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