Janta +2 High School Alinagar

I am a boy of 16 year old and i like a girl from my school who is 16 too.. We both read in same grade/class but in different Section.. Like I'm in Class 11 (Sc.) (A), Whereas She is in Class 11 (Sc.) (B).. And seriously, we have different time tables.. Well, I've opened a conversation Last Month When she was alone standing to catch up a bus for her home.. On that day i told her :
Me : "Hey, I think I saw you in (specific Place) yesterday"
She : "Oh, Yes! I was there"
Me : "By The Way, I'm (My Name) And you?"
She : " Oh (My Name)? Okay"
Guess What? She Didnt Told Her Name.. I think she didnt heard about it..
After this small conversation, a bus came and she went to her home..
(This Was A month ago)
Now, I will talk about yesterday..
[We were walking together towards the bus stop.. Luckily, yesterday the timing was matched]
Me : Hey, Your Classes Are Over too?
She : Yes.. And yours too?
Me : Oh, Yes..
She : We have to wait for the bus again.. I hate to wait for it..
Me : Yea, Its our everydays Issue..
We Crossed The Road Together And a bus was waiting.. We both entered the bus and guess what?Only one seat was left.. So i offered her the seat.. We were in deep silence when we were in the bus.. Now, she got down from the bus and she waved at me saying bye.. And i waved at her.. Now the question is what should i do now to get her to be my closest friend and eventually, as much i know about her :
* She is a bit Shy Type
* She Always Hang out with her girl - mates..
* She is more comfortable with her best friend and she often hangs out with her..
* She dont talk with boys much..
I need help! PLEASE! What should i do next? Even i am shy... And when should i Get Her NUMBER.. THANKS...