I will feel very bad and may even get into a depression if i do not talk to someone.we all know that failures can't be predicted most of the times, that's why people should be careful and put their plans before starting a business so they don't feel shocked when something bad happens, what's the first thing you do once you find out that your business is about to fail or failed already, what would you do?
After recovering from such heartbreak, i will have to settle down and find out the reason for such failure.
If there is a reason to start the business again, then i will.