Пожалуйста, проверьте текст на орфографические и лексические ошибки.
Dear Ben.
I think you should stay with your parents, because you too young for this travel. I think you can cheerfully spend this vacation, and I even tried to make for you the plan of action while your friends not to return and that you didn't miss on summer vacations.
In June you can go the grandmother in New York, I heard it the excellent city, in it there are many entertainments. In July ask for parents to go to travel with tents, it is very interesting and fascinating. And in August already to return your friends and you can spend time with them. I hope helped you with it not a simple question, and you will spend the summer vacations very cheerfully.
Write back soon!
With respect,
Andrey
Буду очень вам благодарен.