YoungEntrepreneur, this is a difficult situation.
First of all, she really does need that time to find out who she is and what she wants out of life, even if that means hooking up with guys.
The only reason she wrote that about the girls on Facebook is because she is jealous, she doesn't want you right now, but she can't bear the thought of you being with anyone else.
What you need to say back to that is "well it wasn't my choice to seperate from you, and I would be with you again in a heartbeat if possible. BUT these are my friends, so do not talk about them so disrespectfully like that please."
Simple enough. The fact is, if she WANTED TO BE WITH YOU SHE WOULD BE WITH YOU. Do not put any more pressure on her. You have done all you can on your side - sent flowers and a poem. Any more is just overkill.