I could ask the same of men. Haven't you ever done those things to someone...even if you didn't realize it?
A better question would be "Why are people so heartless?"<br />
It isn't gender specific, both guys and girls do stuff like this<br />
And yeah I've been on the receiving end of heartless acts like these many times and still can't find a reason as to why people do stuff like this
Depends why they ditch you