So I believe these characters go together:
I feel like Girl 3 goes with Boy 8 better
I feel like Girl 6 and Boy 1 work well (especially because boy 8 is taken. Unless you want to srart drama of stealing a man 
)
I think Girl 7 and Boy 7 go together better
I feel like Girl 8 goes with Guy 6
So:
Girl 1 = Boy 2
Girl 2 = Boy 3
Girl 3 = Boy 8
Girl 4 = Boy 9
Girl 5 = Boy 5
Girl 6 = Boy 1
Girl 7 = Boy 7
Girl 8 = Boy 6
Girl 9 = Boy 4