Relationship advice. HELP! (:?

I've been with this guy now for almost a year now. And he's great I reall love him. But there's a problem thou! When I first started datin' him he kept me smiling none stop, and I constantly wanted to be with him. But then just a couple of months ago I lost the spark I had for him. I hardly wanna be with him, he doesn't make me smile as much, I now find him annoying, and we fight a lot. But we've never have brokin' up since we been together. And I really wanna stay with him, I just want the spark back. What do I do to get the spark back???