Can you tell me how i can feel happy and alive again?

Change your approach: There are a number of actions that you can take to increase your happiness. In addition to seeing a psychotherapist, you might also get a book on happiness--"the how of happiness" is a good one, but there are others. Setting goals, striving, appreciating what you have and the good things that are coming your way, being generous to others with your time, learning something new might also help.