First, do not say "thank you" when you get a compliment. It implies that you feel grateful to receive it (i.e. you don't get them very often). Instead, reward her compliment by
telling her how what she said makes you feel OR how you perceive her in light of her giving you a compliment. Examples:
"I like your jacket."
"I'm glad you like it."
"You are such a fascinating guy."
"Its sweet of you to say that. You are a very sweet person."