You and I were long friends; you are now my enemy, and I am yours.

Friends may come and go, but enemies accumulate.

The nearest I can make it out, "Love your Enemies" means, "Hate your Friends"

You and I were long friends : you are now my enemy, and I am yours.

The enemies you make by taking a decided stand generally have more respect for you than the friends you make by being on the fence

Hear not ill of a friend, nor speak any of an enemy.