Should I continue to lie or tell my wife the truth?

I've been talked to about make up, wigs, and the bachelorette; all of which I have no idea about. Where do we draw the line? I'm the biggest computer geek and I'm not shoving all my knowledge down her throat and expect her to chat back with me or even act like she's enjoying my conversation about processors and sata drives. She will quickly and easily stop talking to me if she's not interested, I just take it as she don't want to talk about it no more and that's just fine with me. If I do it, I'm the biggest jerk in the world. I've even had times when she wouldn't even say em hmm or anything at all and will leave me there soley talking to myself from start to finish. Her problem with me is I have a cut off point. I will devote at least 10 to 20 minutes to her about some garbage that I can't even chat back to her about and then I'm done. The time when I'm done, she takes it as I'm not worth talking to at all, I'm the scum of the earth and maybe she should talk to someone else about bs, because she wants to ramble on and on about something I have absolutely no interest in, and even when I get to my cut off point; I'm the biggest jerk in the world. Somebody please help me deal with this woman. I have no right answers, whenever I act like I like what she's saying she's soo happy she could fly but it's not everyday I feel like lying and acting like I want to talk about her new lipstick. When I listen to all the nonsense and satisfy her every chatty desire, I still will get the charge of being an *** whenever I'm not in a chatty mood that day or not in the mood to lie and act interested in how cute a dog looks even miles after we're gone. I'm so happy when she get's out of the car, sometimes I cheer out loud and instantly start to feel better, and less stressed. I hate feeling that way about her because she is a decent person and I do love her. I like to chat about her or her day, or the kids, or myself, our well-being, how are we progressing in life or something like that; something that actually matters not how stupid somebody on her job wig looks, or how somebody else relationship is going, I don't want to hear about that garbage, that's a waste of time and emotion come on. Should I continue to act like I'm soo in love with everything that comes out of her mouth or should I be human and say what I like and don't like?