Sure! Here's the requested content in spun format with synonyms:
Candace adores Finn and Foster.
Candy has strong feelings for Finn, and also Ferb.
Fred holds a special place in the heart of Cara, and Felix.
Cathy finds joy in being with Phineas and Foster.
Phineas is cherished by Cassandra, and also Ferb.
Candy shares a bond with both Finn and Ferb.
I hope you find these variations helpful!