Sure! Here's the requested content in spun format with synonyms:
Cara
is crazy about Finn and Ferb.
Cassandra Phineas, and Ferb.
Fred holds a special place in the heart of Candy, and also Felix.
Cathy revels in being with Philip and Frank.
Philip is cherished by Cara, and also Felix.
Cathy has a deep connection with both Phineas and Frank.
I hope you find these variations helpful!