Should I even try to get back?

So, a while ago I posted about this girl I was kind of seeing and I fell into her with my heart. She breaks it off, and throws me into the friend zone. I'm over the hardest part of the heart break now.

I threw her a text seeing what was going on, and made a HUGE mistake of seeing what she was doing for the New Years. She texted me that she was "Oh (my name).I'm so sorry. I have a date that night." I told her I already figured that out. Then I threw out that I had a date just that last night. I come to find on Friday via my Facebook that she is now "In a Relationship" with said person(also a co-worker of hers). I want to say she did it to make me jealous. Hell, I even liked the Relationship update to show that I was more of a man than she thought, and that I can move on.

Part of me wishes the whole breakdown of that relationship and return to me type of thing. The other side wants to just be done with it.

Side Note: I wanted to make a reply to the Status update along the lines of: "Great to see you have highest ambitions in your new guy!" It's a bit bf destroy, but definitely a friendship breaker with her. Something I'm not sure I want and I do tend to get a bit destructive after a break up.

Kaustic:
Let things cool down for about two weeks. Most "office" relationships end badly so even though it's tough,don't do anything for awhile. If you do happen to run into her stay real casual but friendly. Who knows when the office relationship sours she just my turn to you for some "Comfort"

Kaustic,

You know i was in the same exact situation 7 months ago. And i was giving up my ex. BUT a good friend of mine gave me the best advise ever; NEVER GIVE UP. Remember that impossible is nothing and u do not want to have any regrets. So come on, get in touch with your ex again, ask her for a night out..something fun, movies, bowling, drinks, go carting, something. BUT dont show her that u cannot live without her, just show her what a great guy u are and make her realise that u are far better than her bf, make her longing for U. BUT once again dont show your fragile part of you. Girls want someone with balls.
She will definately come back to you again. U don't want to live all your life looking back.

GOOD LUCK!