Dear Shirley,
How are you?
It's so nice to hear from you. I'm so glad to be your friend and share your thoughts with me.
Every one has his/her interests. What are you fond of besides study? I guess you have a gift(天赋）for art. Maybe you like singing, dancing, listening to music or drawing. Also, you may like sports game such as basketball. I'd like to know what you like to do and your stories about your interests.
I'm looking forward to your early reply.
Yours sincerely,
Your name