Originally Posted by JBeaucaire
Trust operates at many levels. A person who lies about some things may be perfectly "trustworthy" in the faithfulness department, they may incapable of betraying a relationship while they feel no attachment to simpler facts in general.
Trust is something you offer unconditionally until it is broken irrepairably by the trustee.
It is not uncommon to transfer one betrayal into other areas of your life, but it may not be fair.
Having said all that about HER, this is really about you. You ask US if you can trust a liar and the truth is only you can answer that.
If you can't, don't delay, move on and don't waste any more of your (or her) precious time.