Sounds like to me she is afraid to make the first move, but she keeps dropping hints that she wants to. Maybe now that she senses you are catching on she is running scared. Scared of what she calls commitment. A tattoo is commitment to me. People do silly things when they start feeling out of their comfort zone. Be honest with her, be real. That is the only way to find out for sure. Ofcourse, first you have to get in touch with her. Try calling her again, but I wouldn't call again after that. She knows how to reach you if she is still interested.