Why does my sister's boyfriend speak to me like i'm a little kid?

Im 19, but he talks to me like I'm a kid! I look 5/6 years younger than I really am, but he knows my real age I'm sure No one else notices he does it but I have. I don't know why he treats me like a kid! Like he'll say "you're in trouble" I say why and he says "cos you've... show more Im 19, but he talks to me like I'm a kid! I look 5/6 years younger than I really am, but he knows my real age I'm sure

No one else notices he does it but I have. I don't know why he treats me like a kid!

Like he'll say "you're in trouble" I say why and he says "cos you've been naughty"

He tried to get me a new game console cheap and said to my mum "Well has she been a good girl?"

"Ohhh no you're a little fridge monster naughty girl"

Whenever he says anything to me at all his voice changes, like he's talking to a 5 year old or something, I just don't get it. I'm a little bit childish sometimes but not really bad. Even when he says "hiya" or "see you later" he sounds different to how he would talk to someone else

I sometimes think does he think i'm retarded or something :(
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