Jesus christ dude you are simply shooting blanks now.

You have known her for 3 years, and she is 7 years older than you, while you are 16.
Unless she is into teenagers, then you may be more or less, well, screwed.

Seriously dude, what I suggest you to do is to calm down and stop thinking about girls just for 2 days or so. Because right now you are simply getting boners at random. You need to pick one REASONABLE girl, then focus on her, not some swinging between Aya/Lyss/23yearoldfriendwhoyouhaveknownfor3years/Badmintongirl/whatever.
Honestly, I stopped paying attention a hundred posts ago once I got confused whom are you actually trying to get.

Also, you are moving to Taiwan. Lots of cute girls there (around your age), right?