For one thing I have no idea why you told her you wanted her to text you when she left. That's just my curiousity

.
The way to make something really powerful is to help the other person to create the answer that you want. This way they think it's their idea and not yours. That way it's more powerful. I love one of mystery's number closes because of that," How can we continue this conversation." She thinks I can give you my number. Easy stuff

. The trick is to end on a high note. I know the feeling where you don't want to leave but it works best when you leave her wanting more.
Cut the alcohol. That's my advice to you. Take it or leave it. Alcohol slows you down. You don't think clearly and even though your approaches may seem to have more confidence, your follow through will not be as tight.
I know the feeling of your first 10 interested

. It stems from inner game issues. Nothing's wrong with it, you're probably just not confident enough yet. Closing more 10s will get you there. Just remember the stuff works because you make it work. A robot who does the same things won't get laid.
By the way, how many IOIs did you get from this one?
There are tons of reasons this chick probably didn't respond. Most of them deal with being busy etc etc. Let's deal with the tough ones.
She's got a boyfriend which makes for LMR in texting and meeting a new guy. This pretty much makes me think it's over. She'll not respond because she doesn't want to take that step that might lead to something she may really enjoy in life

.
Part of me wants you to go for it. It's your first ten so why not. Be prepared though because you don't want to devote your life to this girl. Go out and have fun. Open some new sets and find some new tens. If it works it works.
Give her about a day or 2 then text her using one of the openers from text game in the forum. Personally I'd send her something like
"Aliens are coming to abduct all the good looking sexy ass people! You will be safe, I'm just texting to say goodbye"
Your goal is just to open and see if the doors are still open for you. If she responds just play with her and flirt. Keep it cool and don't get needy. Invite her and her friends to join you and your friends somewhere. Frame it so it seems you all already plan to go and they are tagging along if they come. Don't state it, frame it. Go from there. If she flakes fuck it she's probably not going to respond. Either keep her as a friend or get rid of her number.
If she doesn't respond to the text that's your signal to go move on.
If you get her there just be the PUA you want to be. If she mentions her boyfriend use a destroyer. I'd probably ignore her in a suttle way for half the night and entertain and have fun with every one else. Then go in when she starts thinking about why the sexy fun guy isn't hitting on her like every other man does

.