Hmm, me again... I have to say that a lot of people experience motivational problems from time to time. It could be a case of just keep pressing on and getting through it. Be careful about making decisions - don't want to make any that you regret. I don't know enough about the situation - but if it is purely motivational (i.e., transient but going on a bit too long and you want to overcome it, you still think you have the same long term goals), then I really encourage you to work through it - keep on going!!!! It often goes in cycles and you will feel motivated again with time :)
I think by way of advice, if I were to put myself in your shoes I would want to do my best to keep going through the motions, see if things improve, and review the situation perhaps after another 3 months or at the end of the year. You may have a different outlook then and not regret not doing anything too hasty! Hope this is helpful.