Well it kind of sounds like this guy does not know what he wants. I think it is strange that he tells you his moods are because of work and then he says they are because you can not make up your mind. Maybe I missed something there....make up your mind about what?
As far as waiting around for him to feel better ummmmm, find another friend to hang with or some other fun things to do. He does not seem to want you to call him so if he texts you just text him back with brief texts. Remember to keep your negativity in check, but not just for him.....for you.
A positive attitude and a smile on the outside can even do wonders for the inside!!!!!