Flowers! Candy! Responsibilities!

In the last year or so, my wife has become very uninterested in sex. In the last six months we have had intercourse once and no additional play at all. I have tried both initiating and not initiating for a while and seeing if she would. I have been romantic, brought her flowers, made her dinner, bought great wine on valentines day and still nothing. When I try to initiate she either brushes it off as her being tired or "stop being silly, we have stuff to do". I am confident she loves me and is not being unfaithful, she is loving and attentive in every other aspect of our relationship.
I love her and I would never leave or be unfaithful but I am getting to the point where I almost want to stop trying to be sexual.
Thanks in advance.

No fair. Sorry to be unromantic, but: when you married this woman, I think she agreed to have regular sex with you for the rest of her natural life. Marriage is serious business and one thing we can lose sight of is the fact that she kind of owes you.

It's a little more complicated than that, of course. "No fair" will not change the fact that she doesn't seem to want to. Sex out of obligation is only attractive to a percentage of men and women. So:

Of the 142 words you've written here, “We have stuff to do,” speaks the most to me. At the risk of sounding like less the femme fatale you should all be assuming that I am: I have been where your wife now stands. And, at the risk of sounding like a generalization-making, self-loathing woman: a lot of us can't do sex when we feel like the rest of our world is in shambles. Does your wife have a stressful job? Is she fighting with family members? Do you have kids who wet the bed? Is the house a pig sty? Are you having money troubles? I'm pretty sure the recession is killing hornies all over the world right now, for example. If you can't identify any problems like these, maybe there's something on her mind that she's not telling you. Take stress and add secrets and you've got the perfect conditions for a nasty case of the frigidity.

I don't mean for you to become suspicious of her. A secret doesn't have to be sinister or sordid -- it could just be something embarrassing that has very little to do with you, for example.

What I do mean is for you to pay attention for the next little while to anything that could be getting her panties in a twist, in the bad way. Though it may sound somewhat unsexy, maybe instead of buying flowers and making dinner, you need to do the laundry or wash the dishes or do your taxes. Supplement any increased domestic-flavoured sensitivity with plenty of non-sexual affection, just so she understands that you're not putting pressure on her. Sometimes women remember how great sex is when it happens 'by mistake,' i.e., when they find themselves surprised to be wanting it.

If no room for improvement becomes apparent to you, strike up a conversation. Not, “why don't we have sex anymore?” Something more like, “is everything O.K., my sweet? Anything stressing you out?”

One of the few good habits I have is asking my loved ones every now and then, “so what's on your mind lately?” I do it regardless of whether I notice anything different about their mood or behaviour, because I'm really curious and I really enjoy talking and I'm especially curious about the fantastic people I've managed to surround myself with. I also know what can go on beyond the surface without anybody knowing. If you're married to this woman, you probably find her fascinating! Why not ask to hear all the weird things in her brain, whenever you want to, just because you can?