Okay, I'm gonna rant a bit so if you want to hear it plz go. Thx

Okay, so for the past few days a girl younger than me, (I'm talking like 1-2 grade) has made it her priority to touch my butt every time I get off of the bus. Then, when I had enough and FINALLY told her that I felt uncomfortable, and to stop, she got mad at me. She got mad because I didn't want to feel uncomfortable anymore. WHY I CAN'T BE COMFORTABLE, AND I DON'T EVEN KNOW HER AND SHE'S DOING THIS. DOES SHE THINK THIS IS ACCEPTABLE OR WHAT?! DOES HER FRIENDS DO IT, SO SHE PICKED IT UP??? I don't know, but I do know if I could drink I would right now. But I'm underage, and my parents don't have alcohol so yeah.