1. на утвердительное предложение:
при близком знакомстве с собеседником во всех ситуациях с Я можно использовать Me too:

— I like this house. — Me too.
— I've got a terrible headache. — Me too.

или

Схема:

So - первый вспомогательный глагол - I / smb

— I like this house. — So do I. = Me too. = I do, too.
— I like this house. — So does my mother-in-law. = My mother-in-law does, too.
— She has got a terrible headache. — So have I. = Me too. = I've got, too.

2. на отрицательное предложение:

при близком знакомстве с собеседником во всех ситуациях с Я можно использовать Me either:

— I don't speak French. — Me either.

или Схема:

Neither / Nor - первый вспомогательный глагол - I / smb.

I don't speak French. — Neither do I. / Nor do I. = Me either. = в I don't, either.

She wasn't invited. — Neither was I. / Nor was I. = Me either. = I wasn't, either.

He hasn't come. — Neither has my mother-in-law. / Nor has my mother-in-law. = My mother-in-law hasn't, either.