it's the way things evolve. you meet someone when she's young and goes to her first party. no boobs, no computer, cheap clothes, still living with her mom in the Bronx and still petrified about leaving her house dressed in girl mode. You buy her a drink and a lap and she treats you like a best friend
She quickly sees what kind of gifts guys will bestow on her because of her tgirl status and she starts becoming confident, and in some cases very self-centered.
time goes by, and after HRT and a few surgeries she barely acknowledges you when you say hi
it's called transitioning