Do you love me?
Translation: kiss my *ss and let me know that I'm in control here. I'm high maintenance and need you to constantly let me know that you love me so that i feel secure.
As much as you love me.
translation: nice try, im my own man. perhaps you should tell me that you love me, instead of asking if i love you.
Thats a stupid response
translation: you bend down and kiss my ass or you're in for a world of trouble. I want to control this relationship and you better not try to stop me.
now, what do you do from here...
1) you could do nothing. an ok option, it will just prolong things until later most likely. but who knows, perhaps she'll settle down.
2) start assessing whether this was a one time incident, or whether this is going to be a regularly pattern wherein her focus is on HER needs (ie. being told you love her) or whether her focus will be on a give and take (ie. instead of asking y ou questions, she'll make statements of how she loves you).
3) shoot her off a response that kills any hopes she may have of controlling you in this relationship. personally, if it were me, id have responded with..
"how could I not love someone who calls me stupid"
"Two people have called me stupid in my life time, neither of whom I ever spoke to again."
"Not really sure how to respond to your comment. Would it be inappropriate for me to say that your response was stupid? I'm just worried if I do that our conversation will decend into utterly childish banter. What do you think?"
"Your right, it is a stupid response. I thought you loved me. but if you're insulted by the fact htat I said I love you as much as you love me, then its pretty obvious you must not love me. this is confusing. I need some time to think about this. Enjoy your trip and we'll talk when you get back."
anyway, all of the above are equivalent to giving her a good metaphorical slap in the face.