This happened when I was around 32 and my female friend Dani was 20 or 21. Dani was a platonic friend, she was part of a group of girls I was friends with. I’ve always been into younger (legal!) women, but Dani and I never had anything. She was super pretty but she never seemed into me as anything more than friends so I never pursued it.
Dani lived in San Diego but her and her fiends often partied in LA a couple hours away. I live halfway in the middle in Orange County. One night at like midnight she texted to see if I was awake and asked if she could call. She said she was driving home from LA and needed to talk on the phone to stay awake. I offered that she could stop and crash at my place or even stop by and grab a coffee to wake up. She passed on that at first but then said she wanted to stop by because she was getting really tired.
She stopped by and ended up deciding to crash at my place. I was excited but then again she hadn’t seemed flirty and had never really shown any desire to take it further.