I agree with what has been said about this incident, your friend was probably trying to lighten the mood. This is actually how most of my friends communicate with each other.

As for your friendship with her, in this situation she sounds like she was at least attempting to be helpful however if you feel someone treats you poorly only you can tell if it is time to discontinue contact. Try to remember though that nobody is perfect and many times people aren't sure how to act around people having difficulties.

I hope things look up for you.