Questions.

When you get engaged, be ready for these questions:

When did you get engaged? (This one pops up for at least a month, maybe longer. I'll let you know when I stop getting it. It's the ring that tips them off. It's still kind of fun every time.)

How did he propose?

Did you know he was going to propose?

Do you have a date?

Where are you getting married?

Have you found a dress?

And this is just the beginning. Imagine how it's going to be when you really start planning stuff. And imagine all the questions you're going to ask yourself.