Re: aikido crisis. :(
Sorry you feel that way....some people may not agree with this but from personal experience in other sports you can become kind of "bored" if you spend too much time looking at and reading about Aikido outside of practice. This site is great but without you knowing it spending alot of time looking at stuff about Aikido on the web CAN have a negative affect....perhaps removing the fun and making things just a little bit too serious/intense.
My advise would be go to practise...but totally forget about aikido outside of the dojo until your in a much better frame of mind.
Also think about your diet...if your suffering any kind of mineral or iron deficiency this could lead to a real feeling of "lethargy" or "disinterest in things" in general...I know..I`ve been there.
Hope this helps