I didn't read this whole thread, so I'm sorry if I'm repeating anyone, but I wanted to tell you what has worked for me.

I used to have the same problem when my ds was very young and I was home alone with him a lot. My dh worked a lot at the time, and I just couldnt' stay home all day and all night alone with the baby. So how I started to plan my week was to make my outings on the days that he would be out til bedtime. One day I'd go to a friends house and hang out. (I would call her in advance and bring something to share, sometimes I brought bread and we'd use her cheese to make grilled cheese.

) One day I'd plan out my grocery shopping. One day I would go volunteer at a local respite child care place, where I met other moms and my ds could play. I did get better at keeping myself busy/not bored while not spending money as the kids got older. Some ideas:
~do you have any playgroups in the area?
~libraries, parks, go for walks
~invite friends over
~go visit friends
~if you don't like to stay home, make changes to your home so you enjoy being there more often. I have often gotten myself through a rough financial patch by spending a few days deep cleaning. It accomplished a few things: kept myself from spending money, kept myself busy so I wasn't thinking about money, and in the end, I had a clean room or two that I could really enjoy. I have also kept myself busy similarly when I have some leftover paint in the basement and a room to paint. Kept me busy for a few days, then I had a newly painted room to enjoy. You could also move your furniture around, declutter a space, move things around outside a window that you have to look out often so that it is nicer to look at. (I have moved some outdoor furniture so the view is better for me while I stand at the kitchen sink

)
~keep yourself busy so you don't think about money at all.
~make it a game to see how many days you can go without spending any unnecessary money. I agree with those posters who said that saving money can be addictive as well, I have a seasonal job where I just save the money and I love to count it and see how much I have.

Dorky, I know, but it works for me!
~Oh, and also, and this is a big one. I stopped hanging out with people who constantly wanted to bring me out shopping. Instead I started collecting friends who would want my company, share a grilled cheese sandwich, and watch the kids play.

Good luck!