@Lonbomb add "you are in school, the girl comes to you, lean close to you and start talking about question 8 chapters old... Then she wants to give you an answer after you spent days studying together, having lunch together, went to the beach together ONLY two of you, but instead of answer (that you dumbly rejected), she put her personal lip balm she uses on her lips (let's say every day) onto your lips - saying she will give you hint... Is she into you? Well, it's still not clean, she might just tease you"