Sure! Here's the requested content in spun format with synonyms:
Cara adores Finn and Frank.
Cassandra has a soft spot for Fred, and also Felix.
Fred captures the love of Cara, and
also Felix.
Cara being with Phineas and Felix.
Phineas means the world to Cara, and also Ferb.
Cathy shares a bond with both Philip and Foster.
I hope you find these variations helpful!