Sure! Here's the requested content in spun format with synonyms:
Cassandra adores Philip and Foster.
Cara Phineas, and also Felix.
Fred holds a special place in the heart of Candy, and Foster.
Cara finds joy in being with Fred and Ferb.
Finn means the world to Cara, and also Ferb.
Candy is emotionally attached to both Philip and Frank.
I hope you find these variations helpful!