Why would she block me on Facebook again ?

Anonymous
We dated for 2 years and she left me for someone else. It ended badly where she originally blocked my number and my Facebook (we are not even Facebook friends and she still blocked me). A few weeks later she unblocked my Facebook and decided to call me. Then out of the blue 2 weeks later, she sent me a Facebook message wishing me luck on a test. Then a few weeks later she sends me a text saying how proud she is of me graduating college and how its weird to her that she doesn't know when she will see me next. She also said she misses everyone (my group of friends who exiled her. she tried to friend request one of them after this text message). I text her the next day saying if she has something she wants to say, she needs to say it because I'm done doing these one sided conversations. Then I tell her she can't have it both ways where she's only allowed to talk when she pleases then she tells me she doesn't want to talk to me because she has a boyfriend and he is getting "rightfully pissed."

So I guess it's only fair if she can contact me. Now she blocked my Facebook again when we still are not Facebook friends, so I don't know what that means... This happened a few days before graduation so I don't know if that helps. She still has another year and a half left of college and I'm moving a little over an hour away and 30 minutes from her school (she commutes)

*** She is 21 and left me for someone who is 30 and works at a small restaurant that is going out of business. The guy is her neighbor...I'm 22 and an engineer who just got a job and passed my licensing exam. I'm so confused... She has contacted me by phone 2-3 times, Facebook one time and text one time in about 2 months. She keeps telling me we can't talk yet she keeps contacting me.
Why would she block me on Facebook again ?
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