Sure! Here's the requested content in spun format with synonyms:
Candace adores Phineas and Frank.
Candace has strong feelings for Finn, and Frank.
Phineas has won the affection of Cathy, and Foster.
Cara being with Fred and Felix.
Fred is cherished by
Cathy, and Felix.
Cassandra has a deep connection with both Phineas and Ferb.
I hope you find these variations helpful!