Is this otherwise good person, who is a compulsive liar worth it?

This woman my neighboor is such a compulsive liar, she either believes her own lies, I can’t believe anyone could fake what she does, or spends incredible amount of energy to keep it up. I’ve had to blackmail her sometimes to just tell the truth about trivial life activities. I’m in a position to help her, so we interact. I have boundries and can dump her at home anytime. I’m wondering about the worth of this woman, more than moral judgements.