I had an amaryllis that I forced indoors to bloom starting in early Nov 2012 and it bloomed around Dec 2011 to Jan 2012, then I left it outdoors the whole of 2012. It just made its leafy growth. What I did was to hide it in our garage in February this year, and come March, I saw new growth. So I placed it back near our windows and as days progressed, it is now pushing up a new bud. Try giving it some rest, then maybe it will send you a new set of growth with buds.
