Sure! Here's the requested content in spun format with synonyms:
Cassandra is crazy about Phineas and also Foster.
Candace Phineas, and also Ferb.
Philip holds a special place in the heart of Candy, and also Ferb.
Cassandra being with Phineas and Foster.
Fred means the world to Cathy, and Frank.
Cassandra is emotionally attached to
both Phineas and Ferb.
I hope you find these variations helpful!