to be honest, open and sincere
She was sincere and honest.
A guy is sincere if he says the truth. And if he is honest.
You can respond by telling her what qualities you admire about her, why you enjoy spending time with her, and how you see potential for a deeper connection. Ultimately, be honest and sincere in expressing your interest in getting to know her better.
more sincere -- James is more sincere than Melissa most sincere -- James is the most sincere person I know.
Sincere
frank, fair
honest
"Candid" is a word that means honest and sincere. It is often used to describe someone who speaks openly and truthfully.
genuine
Honesty.
integrity, sincere, trustworthy. honest