Sure! Here's the requested content in spun format with synonyms:
Cara adores Fred and also Frank.
Candace has a soft spot for Phineas, and Ferb.
Fred holds a special place in the heart of Cassandra, and Foster.
Cassandra revels in being with Phineas and Foster.
Philip means the world to Cathy, and also Foster.
Cara both Phineas and Ferb.
I hope you find these variations helpful!