So here's the deal:

I met this girl (a solid HB9) at my work about 2 years ago. We instantly hit it off, and started dating a few weeks after she left her boyfriend. It was at this time that I discovered the PUA community, and began using some of the techniques discussed on this site in my dates/meetings with her. It went well for a a couple months, but I eventually farked it up when my true AFC colors began to show. (You've heard similar stories before I'm sure; guys basically turning into complete wusses once they get with a girl they've been sarging.) She broke up with me after about 3 months or so, and I did the typical stupid AFC sh1t that pushed her away even more.

Anyway, it's been 2 years now and though we've maintained pretty inconsistent contact (once every couple months or so, we'll have a short text convo), we've not had any physical contact whatsoever since. During this time, I've changed quite a bit. I'm leaner, more stylish, and overall more confident than I was when she last saw me. I definitely feel like I am more attractive now than I have been in my whole life.

At any rate, this girl started texting me more frequently than normal and has made it clear that she wants to hang out soon. I've been pretty careful about the content and frequency of our conversations - most of which via text - and have been making sure to wait a while before replying, throwing in a neg here and there, sh1t like that.
But the one thing that worries me is how to successfully approach her once we do meet up - I'm worried that it will be awkward since we haven't hung out in so long and considering how much we've both changed.

The last conversation we had, I asked her if she was going to this concert in a couple of weeks. I didn't invite her so much as I just 'let her know I would be there.' I feel that it may be too soon to try and get her for a one-on-one, given our past.

Any tips or suggestions?