The Gamble of Hope and Disappointment

You know how people go around talking about the evils of gambling and how its a sin, etc. I agree that gambling is bad, but we're always gambling in day to day life anyways. Whenever we dare to hope for something, we're gambling our happiness. If we win, well we get happier, if we lose, we get disappointment. If we decide to love someone, we're also gambling happiness, how much we fall is how much we're betting. People say that hope is what keeps us alive, if there was no hope, we would all eventually die, but if we hope and get disappointed, isn't that what stops us from hoping? Fear of disappointment? So is hope driving itself away?