<human>: Could you distill the essence of the text into 1-3 sentences?

PREVIOUS: 

* So i posted a few times here the other day about my manipulative girlfriend and how i felt she was looking over her shoulder the whole time, keeping me on the back burner.

* We had a huge argument about her wanting space and stuff, and she had been in contact with creeps who did her uni course but tried to kiss her in the past. 

* I went home on friday, she went out. We had argued earlier. She told everyone we'd broken up, but not me and said to me that we hadn't. 

* She got off with the creepy guy and a stranger, and i read her Facebook and she was basically laughing at me and saying to her friend and people who were there that i can't find out as she may be getting back together with me (I thought we were but just having a problem)

* So i came back sunday night and dumped her. She went mental and threw a picture frame she made of us down the stairs and smashed it everywhere. Its now midday the next day and she's in bed crying non-stop. She's told me how much she loves me and that she did it because she was so upset. Etc. Etc. 

* What hurts the most is that she showed me the gift she's been working on for our anniversary (1yr), its a huge scrapbook with things like 'favourite memories' and '50 things i love about you' (e.g. want to be with you forever, i want to marry you, i love every second with you, you are the love of my life etc.) **Why would she get off with people and keep her options open the way she did if she really cared about me so much??** I know its because she doesn't.. But then why would she do all this anniversary stuff (she's said things like marriage before and how I'm the one etc)
<bot>: GF wanted space and we had an argument. GF went out and got with 2 people, one of whom i'd said i was uncomfortable with as he had tried it with her before and was messaging her.