Ok so i met this girl on a night out after being introduced by my girl mate. I didn't really speak to her and was pretty drunk at the time so probably asked what her name was like 3 times . So a few days later after the night out i added her and she posted on my wall asking if she knew me. I later said i was out with her and then we started chatting. I left it about 2 weeks before i contacted her in a private mail and managed to get her number because i said she should contact me if she's out again.
The reason im in a pickle is because she said at the end "Dont abuse the number" so its going to be hard to get much convo out of her especially since there wasn't any comfort built on the night out. She is also never on facebook chat :/
At the moment im in university and im going back to my home town (where she currently is). What should i do in regards to getting to meet her and build more comfort when im back home.
Im thinking something along the lines of "Hey i know i hardly know you, but you seem a cool person, do you wanna go into town for some lunch?". The fact is im not sure how successful my text is going to be as the main issue is comfort/value and its going to be hard building that through private facebook mail ha.
Does anyone have a possible text opener for this situation or general advice!?

Anyone have any advice?