There is no right or wrong answer to whether or not long distance relationships work -- it's all a matter of personal experience and opinion and nothing more. I believe if a LDR doesn't work, it's not because of the distance: it's the people - you just aren't meant to be. Sure it's easier to be with partner, living together in the same city but life doesn't always work out like that. If you are committed to your partner, it can work -- as long as there is an end in sight, ie you know it will only be a year, and you always have that next plane ticket for when you will see each other again.
Good luck!