Lies... HELP

So basically me and my boyfriend are going on our first holiday this year but we have booked on with one of his friends and his girlfriend.

So I thought it was a nice idea until his mates girlfriend decides to try and break us up by making up a lie that I apparently said I'd go back to another lads house when we was out one time!

(Long story but one thing you should know is it's a definite lie)

So my friends have said I should just speak to her to break the ice before the holiday but am I right by sticking to my word and not speaking to her till I get an apology?

Don't want to be a push over...