Marcus Aurelius Antoninus was Roman emperor and a Stoic philosopher. He was the last of the rulers known as the Five Good Emperors (a term coined some 13 centuries later by Niccolò Machiavelli), and the last emperor of the Pax Romana (27 BC to 180), an age of relative peace and stability for the Roman Empire. He served as Roman consul in 140, 145, and 161.
Humans exist for the sake of one another. You should add value to others.
Every hour of the day give vigorous attention to what you're doing, and vacate your mind from all its other thoughts. You will achieve this by performing every action as if it were the last of your life.
Embrace whatever happens to you. Always stay true and just.
Never consider doing anything which would break your integrity or which comes from hate.
You should focus on what's under your control. Do not drag on the sadness of loss, move on.
You cannot choose your intellect, but you can display virtues which are in your own power - integrity, dignity, hard work, self-denial, contentment, frugality, kindness, independence, simplicity, discretion, magnanimity.
You should treat others with respect. You should be kind to others as you could be in their position. You should not be angry at others' behaviour, just show them the right way. Do not expect anything from others.
Do not expect anything from your partner. Do things for the sake of them and not for reciprocity. Your feelings should not make you irrational.
Remove the thought 'I am hurt' and the hurt itself is removed.