Well there is a few ways. Leave her a note. Catch her when she is alone (not when she is sad). Or call her.
Just how you get a date with any other girl-ask her out.
ask her to go out with u
You ask her out.
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ask her!
ask Her on a date
you ask her?...Or you ask her best friend if she likes you and is she allowed to date.
Ask her out.
If you can date, ask her out.
ask her on a date
On the date? Ask her about herself.
Ask her out on a date.