You guys couldn't be more right. Everything was great, my game was pretty good in getting her to stay over (she kept saying she should get going, I kept changing the subject), then I froze. I don't know, I actually care about this girl so I didn't want to push things too quickly, even though I probably should have.
The good news is she isn`t making up excuses not to see me. She texted me last night, saying she wants to get together during the week. So, I'm going to invite her over again. If I don't f-close, I will probably hand in my resignation as a PUA

Thanks for your help guys, I`ll let you know how it goes.