My girlfriend is changing so much! What should i do?

listen, she is clearly hurting u and she does not care so, you need to confront her and say if you want nothingg to do with me then lets break up if she says fine lets do that then t means she doesnt want anything to do with you and also she has not liked you as much as she usually did when yall started going out. if she says nothing or say no please or something like that it means she doesnt want to let you go and she will try not to do it anymore.......... but have you thought about this.... were you ever spending time with other girls and mabey she got mad so she did the same thing to you????