First of all, you need to take the initiative.
Think about the consequences of everything you do.
Confession is actually a sign of immaturity. The normal order should be: what to do after she becomes your girlfriend, rather than how I will treat you if you be my girlfriend.
I saw such an example online, I don't know if it's true or not, but it's still worth mentioning.
From: Paoxue Network http://www.paoxue.com/html/147.html