oh help!!

Ok, it's been a while since I've posted here, but something happened yesterday with my daughter that has really thrown me for a loop. First of all, she's 10 and going through puberty, so this could all just be me overreacting. She makes the comment when I pick her up from daycare that she got a love note from a boy in her class. She likes him back apparently. Now, I am of the mind that she's not even allowed to date until she's 16, but she will be able to go out with groups of friends as long as an adult is always either available or with them. I wasn't expecting to hear this NOW. I was expecting it in middle school, not elementary. I know that she doesn't think of "boyfriend" as the same thing I'm thinking of, but I'm still a little surprised. This is the girl who went to school with a pin on her that says "Backoff I'm a goddess". She's confident, secure, and oh such a good feminist. She's WAY too much like me, I think. lol BUT, there's always that relationship thing, no matter what. *hence the reason for the 16 rule* I'm strict, but we have a good relationship. I'm at a loss as to how to approach this first relationship. Anyone have any advice?