M.O.
T.,
I understand what you are saying. I started going NUTS when I was home with my two kids and then the bad weather of Fall hit. The idea of being couped up, with two little people was more than I could bear.
For me, I decided to go work (very limited) part time at the local YMCA. Just the ability to talk with grown ups! To get out of the house and know that my kids were being taken care of on-site (for free). And to get moving physically, really helped save my sanity.
It wasn't so much about a career for me as feeling isolated. I love my children and can't see anyone else taking care of them (as in day care or nanny). But I also had to come to terms with the fact that I NEED socialization.
I too felt alone even when talking with my other SAHM friends. They seemed content, even fulfilled. I was going crazy sitting at home in sweatpants, feeling fat, isolated and constantly being needed.
So, for me, working even just a couple of hours a week helped me to feel better. It also helped me that my kids could have fun - rock climbing, playing obstacle course games, going to swimming lessons, etc. I felt good, I got to talk with adults, my kids got exercise and learned that I go away and come back. On top of it all, I got a little money in my pocket.
Also, for me, after a few years, I was ready for another baby because I realized that I didn't have to be a STUCK AT HOME MOM.
Good luck!