Why am I feeling depressed after feeling happy for about a year?
Nothing stays the same and constant change is the reality of life that accept the facts and do not expect everything would be happy in your life. You are not alone and every one of us face some kind of unhappy moment or the period. Do not think your are unlucky either, many are less lucky than you. If you are feeling pity of yourself, turn the emotion in to a positive thinking and start do something about your feelings. Be positive and it doesn't mean you'll have a happy tomorrow but be patient and do what you have to do first.