I must admit I do find liars quite testing as I find lying to be a truly abominable act, and one that lead to great dilemmas. Besides a liar can never be trusted or entrusted with anything hence having any kind of meaningful relationship with such a person can be a misery! I will however only keep company with them with the hope of making them realize their errors and change for the better. And meanwhile constantly be on guard and not take their word on anything!