I randomly added a girl on facebook the other day. When she accepted me i took a look at some of her pictures and i honestly felt like ive seen/met her somewhere, im just not sure. Its the weirdest feeling.

I commented on one of her pictures and she said "thanks. I feel like i know you from somewhere. Where do i know you from?"

So i sent her a message and said "yeaa....i feel like i know you from somewhere. Its weird. Maybe you have a twin running around? "

She is at work and hasnt responded yet but how could i turn this into something that could end in a number close? She is single and cute and I honestly cant think of anything to say besides something along the lines of "well maybe we should get reacquainted. Whats your number?" orrr.....idk, just an idea

Thanks guy!

Try and talk about places you've might have met, if you can establish a commonality it would help get her comfortable enough to give out a number. If she's not comfortable ask her to chat online through facebook sometime then establish comfort on there and get her number. I think you should be careful of asking too soon vs too late.

Also show some humor/teasing like you did in your message reply back to her but get her comfortable at the same time.

First off, if she mentions again that she feels like she knows you from somewhere: "Yeah yeah, that's what they all say ;-)"

Secondly, what Chazman said, with a few ideas thrown in.

Check her interests. Find one that gives you an "in".
For example if she watches a lot of live music, you: "I just can't place where we met. I have a feeling it might have been at a gig" Don't say which gig. Just "a gig". She's going to reply and ask which band. You're going to reply and say you go to quite a few so you're not sure. Ask which band she's thinking of. Opens up the conversation. Tease her at the first possible opportunity. "Wow, death metal, Is that your guilty secret? ;)"

Second example, if she's a gym member "...it might be from the gym" Her: "Which gym?" You: "Well I'm with (name of gym) since last month, but I've been a member at a few. Which one do you go to?" When she tells you, tease her. If it's a classy gym with sauna and steam room "man, that's not a gym, that's a spa..." If it's a proper gym. "Wow, that's a serious gym. Something tells me you're not a girlie girl. Do they even have showers there?..."

You get my drift.

Obviously find an "in" that isn't a complete out-of-your-depth lie. If she takes a French class, don't touch it unless you spent 2 years in France and can blow her away with your "maitrise de la langue".

Basically just try to open up the conversation, using the interests she's listed on Facebook as your "in". And tease her so she doesn't get bored. Soon as you've established your "in" you've got an angle from which to close.
Hope this helps.