Maybe you could just say,
I'm looking forward to taking you to the prom.
Just start talking to her casually and making conversation, theres no need to press it immediately. If you become friends with each other you will get her number in time.
how do you start an intresting conversation with a girl you really love
To start a conversation with a girl, say hello. Ask how she is doing.
Hello.
Hi how are you? You look nice
Example:Hey Clarie how's it goin??
yes
Sure it is, everyone does!
Try to bring sports in.
No.
kantutan tayo ((:
just be yourself and start a conversation which will intrest her