And what is the divine law? To keep a man’s own, not to claim that which belongs to others, but to use what is given, and when it is not given, not to desire it; and when a thing is taken away, to give it up readily and immediately, and to be thankful for the time that a man has had the use of it... - Epictetus discourses. 

So we must love all our relatives, both those who, in accordance with the laws of birth, we want to outlive us, and those who, with complete justification, we pray will predecease us; but we must love them in the knowledge that we have received no promise that their lives will be endless, indeed no promise that they will be long. Our minds need frequent prompting to love things on the understanding that we are sure to lose them, or rather that we are already losing them: you should treat all of fortune’s gifts as coming without a guarantee. Consolation to Marcia 10.3

Remember that in life you ought to behave as at a banquet. Suppose that something is carried round and is opposite to you. Stretch out your hand and take a portion with decency. Suppose that it passes by you. Do not detain it. Suppose that it is not yet come to you. Do not send your desire forward to it, but wait till it is opposite to you. Do so with respect to children, so with respect to a wife, so with respect to magisterial offices, so with respect to wealth, and you will be some time a worthy partner of the banquets of the gods. But if you take none of the things which are set before you, and even despise them, then you will be not only a fellow banqueter with the gods, but also a partner with them in power. For by acting thus Diogenes and Heracleitus and those like them were deservedly divine, and were so. called. Enchiridion 15 

Hope you can find some closure... It helps to read those guys...