How do I get out of going on a family holiday?

Basically my parents have arranged a holiday but never asked me if I wanted to go and now have just told me I'm going.

but I really don't want to because I have as levels coming up after the holidays and I really just want to stay home and learn cos otherwise I will have to drag all my books away and I just don't want to spend all this time with family cos they will just stress me out.

i asked my dad if I had to go and he said it would be fine if I found somewhere to stay for the week. but then a few days later he changed his mind and said if I wasn't going then none of my family are and they will have lost 2000 quid. But its up to me. That's not even a choice. That's blackmail. I'm 17 and I just don't see how they can force me to go especially if I find somewhere to stay.

So can anyone give me any advice to calmly get it through to my parents and persuade them to let me not go. I mean I wish they would just lay off and accept I'm growing up cos soon I won't be coming to any family holiday

and I said I would definitely come to the next family holiday but just this one is bad timing.

any help is appreciated!
How do I get out of going on a family holiday?
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