Sure! Here's the requested content in spun format with synonyms:
Cara loves Fred and also Foster.
Cassandra has a soft spot for Philip, and Foster.
Philip captures the love of Cathy, and Ferb.
Candy takes
delight in being with Phineas and Ferb.
Philip means the world to Candy, and also Foster.
Cassandra shares a bond with both Phineas and Felix.
I hope you find these variations helpful!