[解析]
One possible version:
Dear Tom,
I'm worried about your being bullied by your classmates.I believe everything will be better for you.I also hope you could be optimistic about your life and become the boy who is confident and happy.【高分句型一】After all,it isn't your fault.You don't need to feel distressed because of others 'behavior.I think it's time for you to make a change.There are some suggestions I want to share with you.(表示安慰并进行劝解)
Firstly,you can make yourself stronger with knowledge.As a saying goes,"Knowledge is power."Secondly,you should talk to your teacher to ask for help.Last but not least,you'd better take part in some events you feel interested in to open your mind and get more chances to get along with your classmates.【高分句型二】I hope my advice can help you.(给出建议)
Best wishes.
Yours,
Li Hua