Sure! Here's the requested content in spun format with synonyms:
Cara is crazy about Philip and also Frank.
Cathy Finn, and also Frank.
Phineas holds a special place in the heart of Candy, and Foster.
Candy takes delight in being with Philip and Ferb.
Fred has a special place in the heart of Candy, and Ferb.
Cara both Finn and Foster.
I hope you find these variations helpful!