[help] How to answer 'I love you' ?

In the case of "you too", you is the direct object.

If you were to say "me too", you'd be saying "I love me too".

What if someone says : I should out of your home.

Supposed I wanna go with him,how can i say?

in the first question - i love you too - it is obviously an informal situation so a whole sentence isn't necessary

your sentence above doesn't make sense - do you mean I am leaving your home? I should leave your home? I should get out of your home?

in which case you could reply 'I will come too' or 'I'll come too'

many thanks