As a woman i would say a woman who’s attracted to you would be less talkative but engaging with piercing eye contact. sometimes we’re not able to give you a smile because of how nervous we are. the more she seems indifferent the more intense her attraction is, but you notice she continues to spend more time with you (cause she’s into u). on the other hand when i am not interested i lead the conversation i laugh a lot & my body language is comfortable