When I can't speak, I write...
If your novel also has 3 sentences ending with a silly question hoping for readers to fill in the smart bits, then I'm sure it will be a flop :D
Follow the trail of thoughts, and let it open.
In the end, it's not going to matter how many breaths you took, but how many moments took your breath away.
Chandrika,If it is with weird thoughts, then it calls for a weird ending too.Take care
Whatever ur mind says is the best for the book. Happy ending is advantageous, but there are not-so-happy ending books which make it worth it.
I would say, leave your reader with something to think and ponder upon for a few days to come once they are done reading the book.
@ Everyone : Thanks!