What is the best way to end a relationship?

Say that is over,  do so on a pleasent note as possible, don't blame the other person and make it clear that you wish them well....

then move on.

Hi,
In a smart sensetive way (face to face).  Tell the real reason(s) to your decision.... say you came to the conclusion it won't work and you can't see that your relations will develope in the way you expected.  Wish good luck, say a nice thank you and........ good bye. 
Best regards,

I know It's a very hard thing to do,the only way you can do this is, is to be as honest, and simple as possible.right to the point,don't drag it on ,for hours.And hope everything goes well.just be kindhearted.

Well this depends on how what the terms of your last conversation ? Friendly , angry,  games ? Face to face is always best but stand close to a door or window . You'll never what will happen next. And if there a real psyco bring a friend your mother or a policeman. Good luck

be honest and kind. minimize the finger pointing & show empathy. remember the golden rule - (treat others the way you want to be treated - Matthew 7:12)

hopefully with this, you can end leaving both your partner's & your dignity intact.