When a woman rarely answers your calls or messages, it's a sign she is what some guru's would call a "toxic" woman. She clearly lacks character and integrity, as anyone with integrity would not simply ignore someone. If she is playing hard to get, well, that got old in 5th grade. I would say your hunch is correct - she is giving you the run around. I am not saying she is not interested in you, she may well be, but at any rate, she is playing games (red flag - game players tend to KEEP PLAYING GAMES even after a relationship is established - they like to psychologically MANIPULATE mates and potential mates), and lacks integrity. Anything a woman should not accept from you, you should not accept from a woman.