If a friend hurts herself, she's hurting someone you love.
Enemies suck, but at least your relationship with them is honest. You don't like each other. You don't wish each other well. Whether you're the type of enemies that loathe each others' existences and are constantly at each others' throats or you're totally content to stay as far from each other as possible, it is what it is. There's no trust there, so you don't have to worry about them betraying it. Enemies can't hurt you the way friends can.
