Maybe he mean 23.
Well man it will be impossible to forget her until you open your eyes and look for another girls around you. Once you see a interesting girl, start talking without wasting a second and there will be no akwardness. Untill then keep busy, work, socialize and take care.
Its best to forget these girls you feel akward with. You will get much better resluts once you stop wasting time and go for what you want with some girl you met for first time in your life.
Here is example.
Doubt kills more dreams than failure ever will