How do I kindly reject a person

I don’t really know where else to ask this, but I recently met a girl in a game (the game is basically just a place to meet random people). We probably talked for over 4 hours, and eventually I called it a night. She then asked for my socials, and I didn’t think too much of it and gave them to her.

The next day, she wouldn’t stop texting it was just constant “heyy,” “what are you doing?” “I’m bored.” Then, very randomly, she dropped an “I love you,” and it all basically took a turn from there. It became clear she wanted to be more than friends. And at this point, I had known her for only about 10 hours.

Is this just a block and disappear situation, or what should I do?

(I have no interest in a romantic relationship or even a friendship at this point.)