Sure, she says she loves you, but words are cheap. Short of seeing her reaction when you ask her for one of her kidneys, is there any way to tell whether she’s really feeling that love? Thanks to science and a little bit of psychology, there is!
She’s happy for your successes. A woman who celebrates with you when your life goes well is truly invested in you and your future together. Does she belittle your accomplishments? That’s a sign of resentment. Not good.