Wasting Time

I know I have a pressing task to do but I just can't get my hands on it. Thinking about the expectations (other people and mine) that go with it, already brings me down. Am I being pessimistic? or Am I just downright coward? Afraid to fail? Afraid to disappoint people? Afraid to take risks? Sometimes, I am just tired of all these negative thoughts. They don't seem to let me go. Maybe, I am just tired of trying to be responsible all my life, all the time.