Wow, I had a boyfriend just like you. And yes, I did the same thing your girlfriend did. I dumped him.
Of course, not to sound rude, but what you did was incredibly annoying. Girls definitely don't want to check their cell phones to find 269450295029852 text messages from their boyfriends in the past 2 hours, especially if majority of the messages asks them what they are doing & if she's busy. Girls don't want clingy boyfriends. They have their own lives; they don't need their boyfriends checking up on everything they do.
Demanding that your girlfriend text you faster than a few hours is a little bit much. She could be busy helping her parents with something, doing homework, sleeping, even taking a bath! She can't watch her cell phone all day long. She might even be paying for each text message she sends you (there are some cell phone plans like that; ex. pay-as-you-go). However, talking it out with you would have been nicer than just dumping you though.
SAULE. reaching for something higher than the sky.