I'm confused a bit

"so she's new to the town...her neighbor is stalking her.. she went to his house to "greet him" n stuff but they ended up making out??? I don't get it. the plot went to fast! I don't get why she was scared when she looked out her window (the first time) and I don't get why she came to his house after seeing him through a body bag out his window. It's weird. Also sure it's love at first sight but why the hell is she doing that to a man she just met?? I'm sorry gng but holy hell!! maybe take it down a notch? "