Now you have discovered this pua, you need to consider broadening your horizons beyond the front of your nose. Give yourself at least some options beyond your office. So, I'd suggest you start going out and approaching girls you don't know, in bars, in the street, in the supermarket. Start with basic small situational small talk, directions, what time the bar closes, etc. and work from there. There's no one easy answer in all of this, you've just got to apply yourself and take some risks.

Oh and if you want to check out some pua lectures, talks, etc. Try Natural Tim or Tyler Durden's Blueprint.