You've been in a funk lately because things don't go your way. Imagine the sadness for all the many things that haven't gone people's way since the beginning of human existence. When you quit feeling sorry for yourself and do something productive that produces something tangible, something that proves to other people and you that you cannot be stopped. You didn't quit. You are bigger and stronger than your problems. Feeling hopeless is worthless, nobody wants it, and you don't want it either. Fact is, as long as you are breathing, there is always a chance, there is always hope. Now increase your chances by doing hard work. It keeps you occupied and you have something to show for it when you are done.
Keeping promises is hard. It requires us to do things we don't want to do. But keep those promises you must do. Otherwise, do not make them in the first place. But since you have made them, you must keep them, especially if it would benefit all those involved including yourself.