Am I hanging on for no reason?

I have been struggling lately with the decision of whether to quit working or not. I only work a little bit each week, and I do everything from home. Usually I work during nap times and on weekends and sometimes in the evenings when my husband is home and can help with the kids. It's not a lot, but it's enough to make things hectic at times.

I want to keep working because I feel like it's the one thing I do that isn't about the kids. It's something I'm good at on my own and has nothing to do with being a mommy. Also, it makes me feel like I'm contributing to our family's income. I know that I'm contributing a lot just by staying home with our kids and taking care of them and the house, but it's still hard for me to get over the block in my mind. I know that what I do has great value, and I would never think this way about anyone else who stays home with their kids and doesn't work, but I just feel like I have to prove myself or something... And I also want to keep my foot in the door and my resume up to date for if and when I do go back to work, although I don't see myself doing that full-time for a quite a while.

But are those good enough reasons to keep this up?

I'm barely bringing in any money and I'm raising the stress level in my house. I'm pretty sure my husband is beginning to resent it, and that makes me sad. But I don't know what to do. I keep thinking that it will get easier, but I don't know if that's true or not. I hate to keep it up if I don't have my husband's support. And yet, I still have such a hard time letting it go...