I have this friend (we aren't that close though),we're both 17 and straight.Well I'm not sure if she's 100% straight....she has a boyfriend, but last year she said she's a little bi/bi tendencies.
Description of her - She's one of those really beautiful girls everyone obsesses over, but she's not conceited...she's kinda reserved and cool, calm.
Well I notice she's tries to be close to me a lot. If we're sitting side by side, she leans really close to me/leans on the bar between us. In class whenever I leaned forward in my desk, she would lean back in her desk (I sat behind her). Sometimes she would lean back and ask me really obvious questions like"what does this word mean?",the way she'd say it...she'd kinda whisper then come really close to my face. Or if we're working as partners, sitting side by side...I'll be holding the paper or whatever and she'll move in really close to me (I can't really explain it)...Also she would like lean and stretch back onto my desk (literally all over my desk lol) then stare/smile at me teasingly or be like "oh sorry :)"
The other day we were at this place, I was sitting in this barstool and she was standing beside me, but resting her arm on the back of my seat...I could feel her moving closer to me...so I just kinda moved closer to her because it seemed like she was gonna whisper something to me,but she didn't...
And also she STARES at me a lot...Sometimes she turns around just to stare at me, look at whatever I'm doing or wearing, andsmile at me...I always pretend like I don't notice though..She gives me a huge hug when she sees me...but mostly she just stares at me. She's so quiet...so her actions make her even more mysterious

