Is She Into Me?
 
Does she go out of her way to talk to you? Does she try and catch your eye? Are there the looks and then the sudden turn away when you catch her? These are obvious signs that she is interested, but it could be both just interest in who you are rather than romantic. You need to pay careful attention to the context. In a gay bar though, they are more telling than in the work place.
 
One sure sign is she makes a special point to sit next to you
 
Two - She makes it a point to engage with you. Does she make excuses to talk to you ? Does she email you?
 
Three - She laughs at your jokes even when they aren't funny.
 
Four - She touches you. Does she find reasons just to touch your hand, like that ring you are wearing? Does she sit close to you and makes sure her shoulder touches yours?
 
Five - She compliments you. Does she always compliment your hair, shoes, smile and eyes? If so, she is probably flirting with you. 
 
Six - Does she joke around with you? Its a great icecbreaker. If she likes you, she will probably tease you and joke around to flirt with you.
 
Seven - Is your intuition telling you she likes you? It is very possible its true then. 
 
Eight - If she tells you. That is one way to tell for sure... Either that or she lays a kiss on ya! 
 
Tips:
  1. Warning: If she is your personal trainer or therapist, these things are part of her job (Well, obviously not the kissing...) She is NOT interested in you!
  2. Pay attention
    Is she acting this way just toward you, or is she a touchy, flirty person in general.
  3. Have good boundaries.
    If this is a co-worker and you're interested in finding out more, invite her to hang out outside of work. Hitting on someone at work is highly inappropriate and may get you fired.
  4. Use Caution
    All of these things may add up to her liking you, but don't do anything stupid or rash. Take it slow and get to know her before you make a fool of yourself.
  5. Find out if she is gay or bi.
    She may not know yet if she is lesbian or bi, but you can start by coming out to her and seeing how she responds.