A: If we really like someone, the date that they wanted to be with us is important. Also, anniversaries are an excuse to spend time just the two of us.
A: If she loves you, she won't care that much that her ring isn't huge. Ask her if she'd rather wait until you can save up more money to get her a nicer one, or if shed rather get a smaller one now. More than likely, she'll take the smaller one.