How to ask for her phone number?

Just say:

"Hey, I really would rather text you instead of using this facebook stuff .. But I don't have your number, any chance I could have it??"

Problem solved .. Not like she's gonna think:

"What a creep! **** that he only wants to bang me!".. You said yourself you're friends.

Just start a friendly conversation and say something sweet like "hey beautiful can I have your number:)?" Something like that.

But if she is just a friend than just say can I ihave your number and she will say yes. Its not hard, your the Guy in this situation make the first move;)

Tell her your problem with fb...be it you find it annoying because you get mobbed on chat...or whatever else, and then say you'd much rather talk by texting if it is okay. Then it seems harmless. You have a great reason, and it sounded casual.

Heyy,

Well since she is your friend, ask if you can hang out sometime whether its movies or whatever and just ask for her number so you can keep in contact.

(See you need a reason to be asking for it-if you just ask for her number and thats it thats weird, even if you know her.)

Dont worry, its no big deal-just dont sound akward.

Goodluck! Hope this helps:)

Ask a friend for her number

Just ask her yourself, but politely, no funny games, nor trickery