And i don't believe her, but I don't wanna be rude in case she's serious. She keeps adding random facts into the convo, and if she was serious the facts wouldn't keep appearing like they do?

I don't know if that makes sense.
But my other friend goes 'what are you two texting about' so i reply 'stuff' and she goes what stuff. And all the facts points to them being together and making fun of me.

This is by text btw.

Thanks