I have similar feelings as well. I feel like I am wasting my life and not accomplishing anything. Sometimes I feel I am just passing time until it is my time to go, like I have not made an impact on anyone or anything. I feel useless and a waste of space. Then I get bright ideas of doing something, I start it and end up never finishing it. It is pretty much an endless cycle. I am sorry you are going through those feelings, and remember tomorrow is a brand new day. It is so hard to foretell what the world holds for us, it changes so quickly.