<human>: Can you succinctly summarize the text in 1-3 sentences?

* ~6 months, no fights or arguments, all of this has exploded within the last week.
* Smart, Redditor, gamer, and comic book nerd (she would know even if I smurfed)
* She was obessed with skyrim, d3, and atari (game system) but doesn't have a computer to even run those games, was planning on spending 5-600$ for all of those for her.
* Week into college starting again she gives a random guy a blowjob(tells me right after), next day is texting and talking about a new "hot" guy in front of me... and thinks nothing is wrong with either of these.
* My argument was that as long as I was 100% willing to do anything sexual at any time, there is no reason for other men. She feels like she doesn't need to be "tied" down, and doesn't see a reason to be loyal. She decided she didn't want to be "tied down" and we ended the relationship. (<1 hour ago)
* I am 21(open, never cheated, random gifts, and **NOT CONTROLLING**), she is mature for her age of 17... but still 17. (legal where I live, had a law student look into it)
* Took her virginity, and my first relationship (non virgin).
<bot>: College starts, within a few days girlfriend starts going after other guys (blowjob), she thinks nothing is wrong, we end relationship. WTF HAPPENED?