I am trying to 100% GTA IV.

I've completed every mission, every random character, every street race, caught 20 criminals through the computer, delivered 10 cars to Brucie and 30 to his friend Stevie, completed every stunt and killed every pigeon. My friends are already at 100%, and I do every activity with them and beat them in every game, and still I only have 97.5% complete.

I've checked my RockStar Game Social Club and I'm not missing anything.I just don't have girlfriends at 100%. What am I missing? Playing on PS3.