My advice, is to believe none of what she says, and only half of her actions.
She is likely turbulent at this time, chaotic. She likely doesn't know what she wants.
As far as others go, and where nice guys come in. There is a difference between whom a modern woman will say they are attracted to and whom they really want to pursue.
Like men, women have some dual needs that sometimes don't match up with one person - someone to provide security and provisions (nice guy), and someone to stir up feelings and emotional connection (other dudes). Most guys are a mixture of both with leanings one way of the other. Some balance it well.
Society says women like nerds and personality, yet as it has always been, they select men with more masculine traits like height, drive, confidence.
However medicines and such like birth control can throw things off course to a degree in my opinion.
Do what works for JQ25. Becoming someone else would be short term or impossible to keep up. Be a better JQ25. Whether you D or R, you'll be better off growing yourself. She was attracted to you and your traits once before. Maybe she feels she wants something else. Often feelings are temporary.
H37, W37 D4, S2 ILYBNILWY 9/19 BD 9/19 EA discovered 10/19 Currently in limbo, no D or S process initiated