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