scott - we've been together for just over a year now, about thirteen months. I wrote it up there but didn't stress it, sorry

I think I also didn't stress that she likes to talk about her day. That's what leads me to believe that she is a conversationalist, or a one-sided one at least. And whether that makes her a conversationalist or not, I don't know.
She loves talking about her day, and she's quite happy and enthusiastic and tells me everything. Not just because I respond when we talk, but because she likes to tell me, and I like to respond.
It's when I want to talk that she seems to get bored. I'll tell her about my day, and it's no less boring than hers, but as soon as I start talking she just seems to switch off and her mind wanders, she starts making sexual jokes or playing with my hair or fiddles around with stuff in the room. Basically anything but listen and respond when I enter the conversation.
By the way, it happened again about half an hour ago. We exchanged a few messages on our mobiles about her day, she sent four messages (with me responding back and forth) about what she's up to. My final message briefly mentioned what I had been doing today and I haven't had a reply. Once she's said her piece she doesn't want to hear what I have to say.
One side of me is saying it's not a big deal, if she doesn't want to hear what I have to say then I shouldn't worry. Another part says 'Screw this, find someone who wants to hear your thoughts!'.
EDIT: The hardest thing about this, I think, is the fact that she clearly doesn't care about what I have to say about general, everyday stuff. Maybe it's boring, but isn't just having a friendly chat a huge part of a relationship? It's not all sex and romance and dinner dates. Since it appears she doesn't really care, if I explained that I wanted her to care, it would be so false. When she responds I would know that she's only doing it because I asked her to, not because she's genuinely interested in what I have to say.
I'm at a loss
