Beware of missing chances; otherwise it may be altogether too late some day.
My high-school years were so mediocre - I moved out when I was 16 and started living with my girlfriend who was 10 years older. Apart from that, I was just a video nerd.
I'm aware of what's missing from my life.
Someone who thinks the world is always cheating him is right. He is missing that wonderful feeling of trust in someone or something.
The Bermuda Triangle got tired of warm weather. It moved to Alaska. Now Santa Claus is missing.