Trust

WHAT DO YOU DO WHEN SOMEONE LIES TO YOU?hOW CAN YOU TRUST THEM AGAIN?

There's nothing you can do, the problem is with them, not you....they lack good character....may have been inadvertent, on purpose, or it may be a habit for them....you'll just have to be leery of everything they say and verify it, when able....you can't really trust them again until they prove their trustworthyness....will take time, may never happen....depends on them

Good Luck and God Bless !!