I'm allergic to nuts.
I am too / Me too
I can't play the violin.
I can't either / Me neither
I like to read novels.
I do too / Me too
I'm not a morning person.
I am not either / Me netiher
I can eat chocolate all day.
I can too / Me too
I don't enjoy watching action films.
I don't either / Me neither
I don't have a pet.
I don't either / Me neither
I don't know him.
I don't either / Me neither
I like ice cream.
I do too / Me too
I can't afford the new iPhone.
I can't either / Me neither