First & foremost, be sure the girl you want to ask likes girls too, ha. After that, just be blunt & straightforward. Ask her to lunch or wherever you want to go. Be confident & don't panic. The worst she can say is "No."
Just how you get a date with any other girl-ask her out.
ask her to go out with u
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ask her!
You ask her out.
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 on a date
If you can date, ask her out.
Ask her out.
On the date? Ask her about herself.
Ask her out on a date.