Bored?

I'm getting bored of our relationship. I have a high sex drive and my man knows it. But I think a lot of the time he uses it as power over me. if we fall out, rather than talk it over and clear the air he'll make me stew on it. I don't like going to bed angry but he can easily just go to sleep and leave me over thinking things. I just feel like I'm getting bored of our relationship now. Not just because of the sex but maybe we're just tied because we have a house together. He's childish sometimes when we fall out and goes on the silent treatment. We've been together 4 and a half years. We love each other but I wonder if it's enough...if I have doubt does that tell me something?