Chihaya: It's proof that girls absolutely cannot stand being ignored by a guy they are interested in, it makes them go crazy.
DarthKaal: Maybe, but it's also proof that this guy didn't really loved her.
- He has not checked his mail in an internet café (yes, the old europe has internet too, incredible!)
- He has not phoned her
- He has not sent any postcard
- When back home, he has read mails that she didn't want him to read
- He has never thought that all she said in mails was surely just to make him mad and jealous
- He broke with her
This girl may have been passionate, and I understand that it can be hard to bear sometimes.
But this dude showed that he was anti-passionate.
The girl's behavior is inexcusable. Your apology of her actions, and especially your last three points are especially silly. Consider how she actually cheated on him after just a few days of not getting answers.
A guy must neither reward, nor put up with any bad behavior.
Look how utterly psychotic she became. Simply, she exposed her true, foul nature to him. He did well in dropping her like a hot potato, as I would have done in his place.
All he ultimately did was being busy and distracted in his foreign trip. The blame lies entirely on her shoulders, not his, and it's ridiculous to paint him as the villain.