Quote:
I don't mess around with Facebook, I think it's stupid personally, and only created a profile because I lost some numbers and needed to get them. Should I try something like "I couldn't believe you were still on this lame site... I just came back to get in touch with you, so you oughta feel special haha

" or something along those lines?
Definetly do not say this. First off you are puting down the site you/her and the whole world uses, she will be like wtf and might get defensive. And then you go on with that needy "I just came here because of you", in her mind she will be like "oh boy".
You havent seen/heard about her for whole 2 years, im sure you both have done a lot of great/imprsive stuff to talk about. Maybe something from the past that you can ask her about and then tease. She asked you a question, answer it, go on with that, be interesting to talk to and try to avoid these interview type of questions, be cocky/funny, not an ass tho.. Use statements and be playful.
For example you could say "Yeah, it was so loud I couldnt even hear my own voice! Just as I remeber you - (...) and loud

. Im doing now xyz."
You also want to end the convo on high note and get her number before doing so by telling you´ll be busy with something and you two should meet for drink before you forget her face completely, for example.
Cheers, hope it helps. Just my toughts tho...