Sure! Here's the requested content in spun format with synonyms:
Cara adores Fred and also Foster.
Candy Finn, and also Ferb.
Finn holds a special place in the heart of Cassandra, and Felix.
Candace takes delight in
being with Finn and Felix.
Phineas Cathy, and Felix.
Candace is emotionally attached to both Phineas and Felix.
I hope you find these variations helpful!