Dream about a girl i saw 2-3 times in school?

I was i my school and i saw a girl 2 years bigger then me an i chased her (don`t know why tho..) and in a corner there was a glass shelf with fishing articles and she hid behind it...And said pls dont hurt me or i tell my dad and she sat down and she took a photo of me with a polaroid and the photo came out with something taped on it a kind of note and it sayd "moto:"and something about a horseshoe cant remember wath exactly.And i read it and she started crying and i was like wath happend and she sayd started crying and i was like why are you crying she sayd she told a boy in her class the rong thing and she raises her head and stops crying and i was like a gotta go cya and after like 15 feet i run back and ask her waths her name she sayd a wierd name i never heard before and we walked half way to my class and i asked her wath am i gonna tell my profesor because i was 10 mins late..she sayd to tell him tath i met a friend and started talking with him and lost track of time and i say bye and she sayd bye.I went ahead of her and went in my class and my teacher raised his voice and sayd go in in back of the class and i saw my mates on the bench and i stayd beside them and tath all because i woke up...sorry for my english if i did some mistakes and im 14 if it matters...