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