My Suicidal Sweetheart (2006)

From the moment he was six, Max wanted to die. He tried shooting himself, hanging himself and even throwing himself out of a window. But somehow, he always managed to survive. Exasperated, his parents have had him committed to a mental institution, where miraculously he's found something worth living for. Her name is Grace; she's a wild mental patient whose death wish is even stronger than Max's. But Max has a plan to save her. They're taking their marriage vows, 'til death do us part, and escaping the loony bin for the adventure of a new start. Max thinks Grace will be cured by visiting her mother, but he has to keep her alive until they get there. She tries overdosing on pills, running in front of a truck and jumping from a bridge, but luckily each time, Max comes to her rescue. Finally, he brings Grace to her mother and in a bizarre turn of events, the terminally ill oddball orders them to dig her grave. Mom says her goodbyes, but not before she tells Max and Grace that they both have something to live for--she sees a vision of their baby girl in Grace's tummy. It's more than the hope Grace and Max have been searching for; it's the wonderful beginning of a whole new life.