Sure! Here's the requested content in spun format with synonyms:
Cathy is crazy about Philip and Frank.
Cathy has
a soft spot for Phineas, and also Ferb.
Philip captures the love of Candace, and also Felix.
Cassandra revels in being with Philip and Frank.
Philip means the world to Cara, and Frank.
Candy is emotionally attached to both Philip and Ferb.
I hope you find these variations helpful!