Make it a rule of life never to regret and never to look back. Regret is an appalling waste of energy, you can't build on it it's only good for wallowing in.
Risk! Risk anything! Care no more for the opinions of others, for those voices. Do the hardest thing on earth for you. Act for yourself. Face the truth.
Could we change our attitude, we should not only see life differently, but life itself would come to be different.