<human>: Can you succinctly summarize the text in 1-3 sentences?

It feels like the honeymoon phase is over- we have had a few fights and we both aren't exactly brimming with joy everytime we hang out- to be honest we get a little bit bored and we recently needed a week apart (where she kept messaging saying she missed me). 

So she arrived back and I was assuming we'd have steamy 'good to see you again i've missed you sex', but no, she's just not in the mood. It's been a few days and she still doesn't feel like it. She's not distant or unhappy (it seems), she just doesn't want sex. 

I'm planning to talk to her if this keeps up for another week, as it feels like our intimacy is dying and slipping away because of this. I'm sure there is a heap of (potentially heartbreaking) reasons she might not want sex, but I wanted to get you guys opinion before I launch into a talk with her.
<bot>: Girlfriend hasn't felt like sex in a while, is this just the honeymoon phase ending or something more serious?