If you haven't sold, then you haven't loss anything. Stop comparing the highest price to what the price is now. You didn't sell at the top so it was never "your" money. Until the money is in your hands, it was never yours. Just comparing the highs to the lows will make you go crazy.
Agree, and vise verse price can rise up eventually, so until you havent sell your coin everything is ok. And it is better to invest your free money and then you dont feel so bad.