Why does it seem so easy for her?

me and my girlfriend of almost 2 and a half years broke up on thursday. Ive been having a really hard time with it because i still really love her alot and didnt want it to end. It seems like she is having a way easier time, she's been out drinking every night since then and just seems like she doesnt care that we arent together anymore. At first she said she still wants to be able to hang out and stuff and now she says she doesnt know if she wants to. Is she just trying to suppress her feelings? Im trying to move on, even tho i really want to be with her still.