My friend got a new girlfriend. I swear she talks to me a lot and whenever i come over to his house she wears sexy stuff like short shorts and sexy pijamas showing lots of skin. She also walks in front of me in purpose kinda like a "hey look what im wearing" type of walk and also will bend over infront of me to pickup stuff she "dropped accidental". One time we were all drinking and she sat on my lap and said she thought it was her boyfriend and apologized.
She could like you, but more than likely she's mainly interested in the ego-boost she's going to get from noticing you checking her out, or possibly feeling you get hard as a result from her 'careless' mistake in sitting on your lap instead of her boyfriends.
Seems more like an attention whore to me than liking you. She seems to take notice that you're looking at her and she likes that attention. She'll probably stop if you completely stop looking at what she's wearing and such etc.