I had one friend that lied to me massively about a criminal charge she was facing (I like to think I learned from that for sure.) Not friends with her now for other reasons which was her choice. I didn't find out the extent of the lies until after we stopped being friends.
I never could put up with lies much, but now I find it even more difficult to hold my tongue if someone comes out with fake stuff. It's causing issues in another friendship.
How do you feel about friends that lie?