Hi Ed,
Welcome to the forum.
What do you mean she ASKED you engagement ring?
Will you marry her in the near future? Do you have any plans to marry her? If the answer is yes so when do you think you will do it? I think this is the first question you should ask yourself before asking us and than know if you WANT to buy her engagement ring (your future wife).
Please give us more details and tell us about yourself.
There are many expats here that can help and advice about your situation because most of us 'been there'.
We are looking forwards to hearing from you.