My girlfriend is hurt...Am I in the wrong?

ok so my girlfriends parents are on vacation for a month, so she is home alone with her sister, and ive been staying over and spending the night pretty much 3-5 times a week and staying at least 3 days in a row at times. she has a low drive, but we still had 4 times before bed last night(and another time in the shower after some convincing). anyways we got into bed and i was super tired and didnt want to cuddle and i told her to just go to sleep. after 5 min she started sobbing a little and i asked her whats wrong and shes like "i feel used" and she's also scared of the dark and needs a cuddle to fall asleep so i just put my arm around her and fell asleep like 1 min later. i left for work early in the morning and she hasnt callde me today. what should i do