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