Help!..what are some excuses to make?

hey guys.i have a female friend that i talk to from time to time. i known her for five years..and i want to take her on a trip to paris...but the BIG issue about this is that she has a boyfriend she has been dating for sometime now....there relationship is very complicated and she even said that she wants out.....that's a whole nother topic..... they live together and she would definitley go with me but she does not know what to say to her boyfriend about why she would be gone for 4 days...any good excuse to she can use????? ps.please no comedians