I agree with redpepper - work on the quality time thing - don't just spend time together doing the boring stuff, make time for the fun stuff too.
It's quite common for folks new to poly to be the "kid in a candy store" with what is known as NRE, or New Relationship Energy. Once that dies down and reality sets in, things get a little more sane.
What I have found is that folks tend to allow the NRE to disrupt their current relationship(s) less and less as they grow in experience.
One word of advice - if she really is poly then listen to what she says about how she treasures your relationship, even though the lights in your mind are flashing "does not compute!" Do some reading about the challenges of so-called mono/poly relationships, and communication challenges in them.
"Listen, or your tongue will make you deaf." - Native American Proverb