to make a sincere promise
faire une promesse sincère (faire une promesse sincère)
"I’ll never tell anyone, cross my heart."
"Je ne le dirai à personne, je te le promets." (Je ne le dirai à personne, **je te le promets**.)
whatever is available or happens by chance
To express all your feelings honestly.
Someone who follows fashion trends blindly
to trust your instincts when making a decision
to be the best or most successful in a situation
to behave independently; not influenced by others