Hey D-Bar
You can tell if she likes you if she remembers what you say. She wouldn't if she had no value for your thoughts or opinions. She'll also find excuses to touch you on certain parts of your body (hugs don't count, some girls hug their guy friends all the time).
Ask her to have coffee or lunch with you sometime. If she's dressed to impress, she may be trying to do it for you. If she does things that indicate self-consciousness, then maybe she's doing so because she wants make sure she looks good for you.
She might even go to the washroom once, twice or even more if she wants to make sure she looks good for you. Also, she might pull her hair back over her hair, turn her face at an angle that seems more attractive, or lean in a bit when you're talking to her - these are signs she's flirting with you.
Max