You may not need to say anything so you don't get to lie. Sometimes, staying quiet solves everything. The moment you try to speak, you may likely tell lies or spill the secrets you were trying to protect, so it better to keep mute.
I am sorry about that girl's mum, she over reacted. I am sorry about that friend of yours that used your secrets against you, he is immature.
I am happy you have grown past everything and that you seek God's counsel instead of human's opinions. Stay positive dear