Sure! Here's the requested content in spun format with synonyms:
Cara loves Phineas and also Ferb.
Cassandra has strong feelings for Fred, and also Felix.
Finn holds a special place in the heart of Candace, and Felix.
Cassandra takes delight in
being with Fred and Ferb.
Finn Cassandra, and also Felix.
Candy shares a bond with both Phineas and Frank.
I hope you find these variations helpful!