<human>: Back-story; She was a foreign exchange student at the high school that I went too, we use to hang out a bit, she grew pretty fond to me but I really only knew her for about 5 months. 

I recently told her about how I started working for the airlines, and could fly just about anywhere relativity cheap, and now shes consistently bugging me to go visit her in her Eastern European country.  

She's got a boyfriend, they've been dating for about 3-4 years now, and she keeps hinting that she will make it worth the time.
Saying that we'll go to a different city, get a hotel room, and hang out their for however long I stay.

Im honestly not trying to take off work to travel across the world to have sex with a girl in a committed relationship... I've tried to tell her I can't take off of work for a week, which is the truth, i've got bills to pay, but she keeps guilt tripping me. "I guess we werent that good of friends" ect.

Can you summarize the given text in a few sentences?
<bot>: How do I tell this girl I don't want to be a relationship wrecker, without her trying to guilt trip me?