Dear Henry,
It's was very interesting to read about your dream of spending summer holidays. I think it's a good idea to spend holidays with friends. So if you dont want to hurt your parents you should say to them about your intend. I believe they will understand you.
As for me, I intend to spend my holidays with parents. I adore Greece, so I think this country will be very nice one for having a rest. As well I like swimming so much so I will be able to enjoy it there.
Frankly speaking, I am amazed by your new purchase. Computer is a very usefull thing. Maybe, it's expensive, isn't it? How much is it costs? And how is it look like?
I look forward your reply. Write back quickly.
Best wishes,
Gohn