Dear Lucy,
I am so glad to have received your letter and I am happy that everything worked out well for you in America.I didn't have as much luck to get a friend like Mary here in Australia,so I have been really struggling with my study.It kept me busy pretty much the whole time,I love to make some friends here soon who can help me with my English,too.
Say hi to Mary,write often.I promise I will write you whenever I can,too.
Best Wishes!
Love,
Sally