Things got weird after an old friend and I agreed to date?

Hey everyone.

I'll make this as short as possible.

So I know this girl...Her and I were friends most all of high school and we hung out pretty regularly for a couple of years after we graduated. I've always had sort of a crush on her, and whenever I managed to work up the nerve to tell her she was normally already involved with someone. After awhile her and I stopped talking, ''not because anything bad happened'' just because we got busy moving forward with our lives. I went on to have a few romantic flings and she became involved with someone we had not gone to school with. After a couple of years past her and I ran into each other again threw a mutual friend and we started hanging out like we used to. At this time I was single and she was involved with a true loser of a guy. Not long after her and I started hanging out she told me of her intentions to leave him because he did not treat her right. I went against the red flags and asked her if she would like to go out on a date ''after she left her guy of course'' and much to my surprise she accepted right away. That very week she left the guy she was dating and moved out of the apartment she shared with him. She called me the very day that she did this and told me that she was not quite ready to date as she had been with this guy for almost two years at this point and needed a little down time to get over him, Which seemed totally understandable to me so I told her that was absolutely fine, and with that said her and I both agreed to continue to see and talk to each other on the same ''friendly'' basis as we had been doing all along...

...That was the last time I heard from her. That was back in June. It is now September and I have not received one phone call or E-mail or anything from her. Since June I've tried to contact her by phone on several occasions and have left her a few voice messages only to not have them returned. I don't know whats going on honestly, Maybe she hooked back up with her Ex boyfriend and is afraid to tell me? Maybe she had a change of heart and just wants to be friends after all? If it were either of those I would be absolutely fine with that, I just wish she would call me back and let me know whats going on.

So with all that said, I guess my question is...What do you guys think? Is she giving me the run around? Her and I have been good friends for about 8 years now and I never got the impression that she was that kind of girl, but perhaps I was wrong.

What do you guys and girls think?

Thanks.

Nathan