How do you talk to girls just to hook up?

How do you talk to girls just to hook up or get a FWB type relationship. I keep talking to girls i like and im just being me and they assume i want to hook up and idk why. Like ive been in their rooms just chilling and leave and then like weeks later theyll be like All you want to do is hook up and ive never even had sex.

I figure if this is how theyll treat me thats how i act. and it seems to work out for other guys. But i dont know how to act that way. any tips?