I didn't read any of the other replies, but no, I don't think you're nuts. I went through a phase like this after I got married, and unfortunately it ruined our marriage. I was on an antidepressant (which looking back now was dosed too high), a prescribed stimulant for ADD (which I abused), and then came home most nights after work and drank wine and self medicated with herbal matter. I was bored and lonely and feeling unimportant so I also started unhealthy friendships with men. My husband worked second shift and I worked days, so we didn't ever see each other much. So my advice is don't start any of those things that I did, and if you have already, try try try to get away from them. You may need an antidepressant, I know it helped me in the beginning when the dose was still low. Try visiting a tanning bed once a week for the light therapy - it really does help. Think about getting yourself a therapist, someone human to talk to. Go to church, even if you just sit in the back, the right church can make you feel inspired. Plan another party - I always liked having candle parties and would invite coworkers over. It gave me a reason to be motivated to clean the house and I liked planning and hosting.
I had high expectations about marriage too, and unfortunately wasn't aware that life becomes, well, just life after the wedding. I thought we'd be in love forever, that the excitement that came with the wedding and the engagement and the planning of our future would greet me every morning when I woke up. That's not how it works though. Life gets stale. But you have to have it in your brain - and I mean thoroughly, completely saturated in your brain - that bad times, stale times, boring times happen and that you're going to stick it out.