I know how you feel. I became completely emotionally detached from writing for well over a year. I continued posting in forums and chatting with people, but I wasn't writing fiction. There were things going on in life that just had me utterly distracted, and locked my emotions out of my creativity. Sometimes life intrudes on us in that way. Sometimes it was completely my internal critic, scolding that my writing will never be good enough, "They're all gonna laugh at you..." syndrome I call it...(original Carrie movie reference.)
Good ideas aren't pouring out of people's ears constantly, so get that out of your head. You can't compare people's creative steps to producing work, it is different for everyone. Some people come up with 10 ideas a day, but never get one of them written to fruition. Others might get an idea every few years, and churn out novels.
I realized I was doing that too, until I realized that many people's brilliant ideas are actually crap.
During my dry spell, ironically wasn't the only one going on at the time, I did a lot of reading. I bought like 10 new books from a range of genre, of course pre-screened for entertainment value at the store, and proceeded to read my way through all of them in a summer. By the end of the summer I had many ideas floating around but little to put on paper.
I had finished a novel recently, but lost inspiration to edit it, but had nothing else to do. Reading filled in the gaps. Making out with someone wildly inappropriate also can have an impact on creative juices flowing...at least from what I found.
Don't despair, just do some reading, watch some movies, hang out with people, chat on forums, live some life and relax. You can't relieve idea constipation by trying to force it. Ideas just flow better when you are more fluid.