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