Sure! Here's the requested content in spun format with synonyms:
Candace is crazy about Phineas and also Frank.
Candace has strong feelings for Philip, and also Ferb.
Fred has won the affection of Cassandra, and Frank.
Cassandra finds joy in being with Phineas and Foster.
Fred Cassandra, and also Frank.
Cara shares a bond with both Fred and Felix.
I hope you find these variations helpful!