Мне нужно написать письмо на другу, как я себя чувствую 9классником.

                                                                                                                 Your town
                                                                                                                 Russia
                                                                                                                 10/09/15

Dear friend,

I was very happy to hear from you! I'm sorry for keeping silence for so long. I was busy up to my eyes with my Biology project.

I'm so happy now to be in the ninth form! I feel myself as an adult! I think it's one of the most important school years in all our school life. This year we have to pass the exam and I hope everyone will have an excellent mark! I should prepare all this year not to have bad results.

That's all for now. I have to go and help my mom. Looking forward to hearing from you ASAP.

With love,
Your name



Это стандартный вид письма, формат, который требуется на ГИА (нынче ОГЭ). С подобным письмом я получила максимальный за письмо другу.
I hope it will be helpful for u. Good luck!