Some (possible) shortcut answers to your problems:

1. Since we cannot get what we like, let us like what we can get (Spanish proverb).

2. This too shall pass (My Best Friend's Wedding)

3. Why your problems seem bigger than anyone else's? Because they are yours (Magazine).

... so now you consider yourself as the unluckiest person in the world?

Actually, life is great as long as you think so,

... since there is no good thing or a bad thing, but thinking makes it so (Shakespeare).


What's the valuable possession by the way?

Your life and every piece that constitutes it, every single second, every single scene ...