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