i wanna marry her

hi my name is akshay kumar hiremath and I love one girl whos name is snigdha gopinath she is in 8 class and even me i love her even she loves me but she says that it is not love its infatuation. so how to make her believe that i really love her. she is very beautiful and wanna marry her in future and she even says me that i am not romantic. so how to immpress her and how to be romantic