Why did she just block me on facebook?

[Malika]

All relationships are based off of good communication. If she really is your best friend, you can talk to her about this. Since she blocked you, that's her internal issue, not your wrong-doing. If she is really an important person in your life, then I would talk to her in person and ask her why she blocked you. Maybe you need to re-evaluate your friendship with her, and see if her actions show that you are her best friend as well, and not just the other way around. Remember, actions speak greater than words. I wish you the best of luck! Hope everything works out. You never know, it may have been an accidental block.