what happened?

Hello, I love the Alice books. I was wondering, did Patrick break up with penny or was it mutual? Why did they really break up? Did Patrick really call her by Alice’s name sometimes or did Jill make that up? Patrick said that penny demanded way too much of his time, what exactly does that mean?

Sigh….  (1)  Probably mutual   (2)  Got tired of each other  (2)  He really did  (4)  He wanted to do other things.