Never abandoned a TA yet, if they were still playing. The Bulgarian army (not counting a few scrappy static divisions) is now dead, but then after her turn you knew that would happen. If she is still playing, I have no issue with you trying to save her. I am actually impressed and gratified she is still playing, many in her position wouldn't, which I think is the bane of Victory!
As for the next few turns, best strap it on. I am not that easy to kill.