What does it mean when my ex hides from me every time I see her?

You see it all started when I was in college. I started seeing here from time to time. I never had any problems seeing her. I would travel greater lengths just to see her. I accepted her to be in a relationship with and not only that she has a son as well. Now I did accepted him into my life as well. I have known her for five months. Than one day I tried calling her and texting her. After a day of calling and texting I received a message from her on my MySpace page telling me that her sisters don't like what she was doing so she had to stop what we had in between us. The love, the happiness, the dinners and etc. So what is wrong here. Did I do something wrong? I just wanted to be with her... I know I loved her. But what did I do wrong.
What does it mean when my ex hides from me every time I see her?
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