What it you fall in love with them ,marry her ,and down the line she starts suffering with it ?.....it's not a personality defect mate ,don't get being depressed and suffering clinical depression mixed up ,you can be cheerful , have a positive outlook ,lead a meaningful ,happy and fulfilling life ,depression comes ,and you face it alone ,you try hard to function whilst trying not to infect loved ones with your deep,deep inexplicable despair ,it's a lonely illness ,often made worse by a person's inability to articulate or explain it to a cynical circle of family and friends .