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