Go mix-a-six of some beers you like from various styles, preferably something you haven't had in a while. Maybe one or more of them will give you some inspiration.
Try out a new style, or one you haven't done in a while. Maybe go to the LHBS and see what seasonal yeasts they have and see if any of them inspire you.
Set a schedule. I was in a big funk a few months ago. I had brewed a few styles for the first time and none really turned out as well as I had hoped. And in the middle of all that my winter warmer (which was initially a delicious ESB) got infected from a cinnamon stick. But I have a tough schedule to work around between work and family, so I only get 1-2 potential brewdays a month. I schedule them into my calendar, and brew whatever's scheduled when the day comes. I still enjoy it; it doesn't feel like work to me, but it does keep me moving forward regardless of whether I'm in a funk or not.
If nothing is jumping out at you, then brew some solid recipes that you know you're going to want to drink once the weather gets warm. Even if it doesn't do much for you now, you will appreciate it in a few months. IPA, APA, Helles, Kolsch, Pils, etc.
Finally, it sounds like you do actually want to brew. But if you're not feeling it, there's no harm in taking a hiatus for a bit. Stick around on the boards, stay involved in the conversations, and sooner or later something will jump out at you.