Met girl off dating app, date went really well. She kept showing lots of interest in me, said she liked me, how I seem amazing, etc. Take her back to mine, make out, and pretty soon I'm fucking her on the couch. I cum quickly on her body but stay hard, so I put on another condom and keep fucking her.

She's really grossed out by my cum on her so she tells me stop, goes to the bathroom, then says she didn't want to have sex on the first date, feels like she gave it away, etc. I put my clothes back on, comfort her, and then drive her home. At the end she told me she had a lot of fun, she liked me, she likes sex a lot, but wants to feel special and not just have it turn into a situation where we just have sex.

I'm pretty confused. Why did this happen? Is this a big red flag and a hard next? Did I fuck up somewhere?