yeah really sucks, I was also wondering, do you freeze her out to a certain level or do you rather do the opposite and seek rapprochement in this situation ? Ofcourse you must always(!) be yourself, but if you're still in the butterfly-everything-is-good-period and she's past that time, I think it's adequate to adjust your own behavior temorarily in oder not to loose her or be too overwhelming or 'too much'. Maybe I just forgot my own number 1 rule: just don't care ( to a certain level ) ?? Another problem; in the beginning you had sex each opportunity you could get, and now it seems as the sex isn't that good anymore, is the 'sex god method' some lecture you would recommend to get that fire back in your bed ( and anywhere else
) or do you have some really simple 'tricks' 
I would really like to hear some opinions/experiences !