Is he really being straight up though? Saying "I dont want anything serious" aint the same as "I dont want you. I just want this nut." And it dont really mean shyt if you spending all kinds of time and talking that good shyt when you want some box. Thats games breh.It's sex.
Dudes could be straight up and she'll still fall in love and try to change the dynamics. She might stop taking the pill to get pregnant hoping you'll stay.
Broads need to stop fukn. That's the main reason. If they were casually dating without sex they wouldn't have problems.