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