I think by friendly they mean want to have sex with you, not friendly people. And yes, it's very weird, it happens all at once, and they initiate this dialogue even if they won't sleep with you just to tell you that "oh, by the way, you ain't gonna get any", in a very passive aggressive manner. If you are not interested in me, and I never showed interest in you why suddenly, out of the blue you tell me how unworthy I am to spend the night with you. People don't talk like that lol