Like2bike2, I'm sorry. It's painful stuff.
I don't usually post about people's personal stuff because I often don't know the person well enough to feel qualified to comment. But.
Lying is an absolute, not a relative, problem. I think that's really fair and accurate to say. I don't think habitual lying and good relationships can ever go together. Integrity matters.
I am really sorry. You will get through this and come out the other side---that's not always easy to remember when you're in the midst...but you will.
"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks