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