Dazed And Confused.

My story expands over a 12 year marrage. It's been a long hard journey. I'll try to keep it simple. I try hard to think back to a happy time in my marrage, but I can't seem to find one. The story starts with a typical family. Three wonderful kids, house, and a dog. It has been a long deep thought of mine, just like a lot that I've read about, that I'm only here for the children. We have nothing in common, we share no intrest, we have no alone time, and she doen't seem to care about any of this then I try to reach out and talk to her about these problems. I have been 100% faithful, but it's getting harder and harder each passing year. I didn't know what to do anymore. So here I am, turning to strangers for help / advice. Like I said I've tried several times to talk to her about how I feel. I get the same reply everytime, "it's not that bad, we're not the only ones going through it, nothings wrong we're fine". I don't feel fine. If I did, then I wouldn't be trying to explain how I feel. When I get home from a hard day at work, or even an easy day at work, and I just wanna spend time with her. She's on the computer, like always. She'll be on it from the time she gets up til the time she goes to bed, unless she's working, then its from the time she get home til the time she goes to bed. You'd think she'd run out of things to do online, this has been going on for years. I understand happiness goes both ways, but if there is anything wrong, she won't talk to me about it. Just drowns herself in the computer all day long. No alone time of any kind. Going out to eat, taking the kids out somewhere, a date night. Anything just to connect. Sex has even become a full time job. Usually once or twice a month, if I'm lucky. And when we do it at all it's usually just hit it and quit it. Just hurry up and get off so she can go to sleep. Complete lose of connection and the whole reason for sex as a couple. I mean if I just wanted to hit it and quit it I could be sleeping with anybody. Am I wrong in just wanting to feel passion again, to get connected to my wife? Do may women that are just tired all the time, get their man off so they can just go to sleep, or is this just weird? I just don't know what to do anymore. I've tried to reach out to her and tell her how I feel. Now I'm reaching out to strangers. Can someone please give me some honest insight? Til then I'll just remain dazed and confused. Thanks for reading my story.