[Vyse]

Why do you care? If she was important to you, then get in contact with her some way and find out what happened. If not, whatever.

To my knowledge you can't really block people on My Space / Facebook, you just delete them. Someone blocking you on AIM is a sign that they don't like you. Someone deleting you may mean they're just indifferent and don't really care; I've deleted many people I've grown apart from / don't enjoy talking to anymore out of the blue, so it may not necessarily be negative.