"You are my lamp, O Lord; the Lord turns my darkness into light." -2 Samuel 22:29.
In every dark situation you are in, no matter how little it may be, there is always a light in it. But finding the positive side in every negative is always a choice. It's up to you whether you'll see the dark situation as entirely negative or look at the bright side of it.
Yes, life is unfair; that's how nature was made by God. But enjoying life already depends on your outlook of it. Be positive! There's more to life than your problems. Lift them all up to God and He will make miracles which you never knew was possible. :)