I wouldn't worry too much. I was pretty interested in boys around the same time. She's going through puberty, her hormones are running wild but I can pretty much guarantee you she has no idea what to do with them. When I was 12 I wanted to marry George Clooney and was totally obsessed with male celebrities. Thankfully, that didn't transfer to boys my own age much, but that was mainly because I grew up without a dad. Anyway...Always go shopping with her and help her pick out appropriate clothes. Don't let her wear shirts with v-necks, they always end up lower than you expect. (A major problem for me, I can never seem to keep myself covered enough in a v-neck!) Don't get her short shorts or skirts. But, don't make her wear clothes that are too baggy. If she hasn't already, she'll develop an interest in fashion soon. You may need to take her to the juniors section rather than the kids section to find her clothes that fit better, just make sure you see things as she tries them on, don't just take her word that things fit appropriately. As far as boys her own age are concerned, they're probably a little young to be doing anything inapporopriate. But just to be safe, make sure she spends most of her time with girls her age and that if boys are going to be around there is a large group of kids. If a boy comes over don't let them sneak off to a room by themselves and have her keep her bedroom door open whenever one is in the house.Finally, make sure you talk to her about sex and relationships. She'll find out the information somewhere, it's best if it comes from you.