You've all been utterly failed by society.
I'll tell you the secret. The ones that are already taken are the ones that you go for. Unless she's married - and even then, shit, so long as you can avoid being murdered - the good ones are *always* taken, and you want a good one, so be better than whatever clown she's with in some way. And don't be afraid to touch. Her skin is not a mystical rape charge bait. If you've even so much as shared a smile or laugh then some manner of light non-outwardly-sexual touching will move you forward. Be about something. Anything. Have something you want to do or show or tell her about. And when you get the eyes, act like you already won and she's all yours to play with, because she wants to be.
Also, the standard is not 'attractive' it's 'not unattractive.'
t. guy that married my 12 year senior gf away from her 20yr partner, had a few long term gfs and a few one nighters, and also left my wife for another hot chick, spent a year with her and went back to my wife after we mutually agreed to break up, and also i'm missing the top row of my teeth, most of my bottom teeth, and the ones i have left are horribly rotted and have been for years, hanging on thanks to silver blackening
if you're dirty or unkempt or not caring for your appearance then nobody else will either, show her a little respect, you wouldnt fuck a scraggly crackwhore that just climbed out of the gutter, and if you look like that then you have no business even trying to get with anyone
tldr if there's no chicks that aren't taken, take the ones that are taken, shouldnt hardly even register, and if you wouldn't fuck you, nobody else will either