I felt violated and scared!?

Im 15, and me and 2 girl friends were walking down a main road at about 9pm. We didnt really look slutty or anything, we were all just working shorts and singlets. But anyway, as we were walking a car with teenage guys pulled up next to us. One of the guys said "Babes, wanna f**k?", then drove off. We were all really scared, and now i feel really bad. Something could of happened!