Sure! Here's the requested content in spun format with synonyms:
Cathy adores Finn and also Felix.
Cathy has strong feelings for Phineas, and Felix.
Fred Cathy, and Ferb.
Candy being with Philip and Felix.
Phineas Candace, and also Foster.
Cassandra is emotionally attached to both Finn and Frank.
I hope you find these variations helpful!
