Hi dude!
I read this, and basically you're fine. You've opened a set which is great, opening while alone is a great feat, since you have more pressure on you.
What you could've done is take it somewhere, understand that the opening is only to get her to talk to you, that's why my opener is basically "Hi".
I think the main reason why you can't progress in pickup is because you just think too much and analyze the situation around you all the time.
Once you've opened her and got her to laugh just smile and introduce yourself and talk to the girl. Be confident and glad to have met her. Attractive men don't hit on girls, they talk to women. So just talk to her and smile, do't think too much about what's going on or how she thinks of you, just listen to her.
Learn how to hold a good conversation, ask questions and make statements, read Gambler's Natural Game, he explains it great there.
Next time, after you open, try to neg her or introduce yourself or whatever feels right, don't worry about the outcome, it what makes you attractive: don't give a fuck
-Kem
A sincere thanks for the response. First, I'd like to mention that the opener was rather spontaneous and seemed unnatural now that I think about it. I mean who just goes up to some girl in the face and asks "you're from X?" Also, you said attractive men simply talk to women... however, this lands me up in the friend zone by experience, any further input would be great. Time to go read some pathology.