Sure! Here's the requested content in spun format with synonyms:
Cathy is crazy about Philip and Ferb.
Candace has deep affection for Finn, and also Felix.
Phineas has won the affection of Cathy, and Frank.
Cara revels in being with Fred and Ferb.
Finn Candace, and also Felix.
Candace is emotionally attached to both Fred and Felix.
I hope you find these variations helpful!