They grow up SO fast, don't they?
One of my daughters is 10 and going through a similar stage. I have a couple of older children/stepchildren that I've helped through pre-puberty and puberty as well. I discovered that the majority of 14 year olds have had a sexual encounter of some sort. Yikes!!
First piece of advice, teach her that she doesn't need to justify herself to anyone. Her choices are her choices and what other people think isn't relevant. Don't cave in to peer pressure just to be one of the cool kids. Help her to understand that she doesn't need to explain herself and how to ignore bullies.
Second, tell her that its perfectly ok to think boys are silly, because at that age..they ARE! She can and should be picky. One day (preferably a long time in the future) she'll find they're not so silly and maybe even like one or two. And that is her choice and not some mean, pushy kid at school's choice.
Third, if she hasn't already, she's going to start menstruating soon. It's probably time for a little birds and the bees talk with her. Hormones will start kicking in and you should probably reinforce whatever your sexual beliefs are...abstinence before marriage, birth control, monogamy, etc.
I taught mine (boys and girls) that their virginity was special and a one time gift. It was something they could only give once and to one person. So choose wisely. I taught them that it was ok to be celibate when every other kid wasn't. I asked them to come to me prior to any sexual activity so we could work out a method of birth control. I taught them what love and respect was like and that being pressured to have sex wasn't part of it. And that they had a perfect right to say no, I don't want to, and I'm not ready. I told them that "If you loved me...." is not a good enough reason to give someone your body and the perfect response was, "If you loved me...you would accept and respect my no".
Its worked so far, 22 yr old was 17 before she had her first encounter and has had no unwanted pregnancies or STD's. The nearly 18 yr old is also waiting because he's picky and wants a long term girlfriend before becoming sexually active. And since he's so picky, thats taking a while. The 10 year old? Just found a boy she likes.../sigh.
Stormie