Crush please help, am really in need of a answer, am begging u please, i know its a bit long but please pleas?

Theres this girl in school, at home we talk to each other but in school we never talk, and i cant talk to her because am always shy, so one day i asked her why she doesnt use to talk to me in school and she said nothing, so i told her i use to be shy so she now said then just forget and shun and i said ok so just 2 hours as i called her, she now sent me text saying why did i call her when i said i use to be shy to talk to her, then i said i dont use to be shy talking to her on phone, den she now said den talk to me in class tomoroow but i said am too shy, so tomorrow was my birthday and she bought a book for me, i already knew it was for me through her friends, but she was acting a little bit shy to just give me the book and say happy birthday, so finally this girl that dont use to talk to me in skul, one day just buys a book for me and says happy birthday, two of her friends birthday was on the same week with mine but she didnt give them anything so what is actually happenin, still today we dont talk at school but always talk at home, just between us its her mother that insisted on buying the book for her to give to me.