all over again

so this past week ive been trying to keep my mind off of her and it was some ehat working. i mean every now and then i think about her or reminisce about the past but other than that i thought i was doing pretty good. but all of a sudden today she messaged me on facebook. as much as i didnt wanna answer, i couldnt help myself. then we talked on the phone and what not. now i feel like i did all that work this whole week for nothing. now im right back to where i was. im still confused. idk what to do. should i keep talking to her or should i just stop? idk im lost. i missed her so much. i knew this was gonna be hard but its killing me.