Is AUTHOR wrong in the post ? POST : Hello so me and the girlfriend in a bit of a pickle and she's saying i'm in the wrong but i think i'm not, please shed some light on this.

A few months ago we booked and fully paid for our very first Holiday together. The date was set for the 1st of June. She is currently on her final year at university and during this time of year she has a bunch of exams to do and it's very stressful. The idea for the holiday was that she finishes her exam on the last day of May and the following day we go away. Turns out one of her exams has been moved to the 3rd of June when we should be away in another country. We would lose 50% of our total money spent if we cancel and we would lose 30% if we reebook. 

The problem is, i'm not exactly well off and i cannot afford to reebook and spend the same amount of money for another holiday. I told her if we cancel we can't go on another holiday until next year essentially due tocother commitments we have going on.

It's neither of our faults this has happened but i put all my eggs in this basket and i like this basket. I was going to invite a friend to come along and pay for her side so she gets her money back. 
I explained that's what i wanted to do but she's saying i'm being an asshole as this was supposed to be our holiday. I don't particulary want to waste my money so if i do go ahead with this. Would i be the asshole here?