就好像用那些字词能突显出自己在写informal letter..比如I'm very happy about you letter.
YES.
然后还想问的是,最后写什么句子结尾?
I hope it can help you?OK.
You can also write:
I wish you all the best!
I hope everything will be going well.
I am looking forward to your letter.
Write me when you have time.
etc,etc,...
再然后结尾称呼那里用your faithfully还是sincere?
None of them,as they are too formal.
Take care.
with best regards.
your love is also an option.