Frustrated!

I am just so frustrated with parts of my current living situation! I love, love, love my job and it IS a great professional job with good benefits and above-average pay. However, I am having a hard time making ends meet. The BF (with whom I recently moved in, with each of our daughters) is very positive and has been working extra hours and such, and has offered to watch my daughter if I wanted to start a second job to earn more income. But the fact that I am seeing people, other single parents, who have so much disposable income, in part because they are being unfair to their exes in terms of child support or other reasons, after I worked SO hard for my education and my job has been really, really frustrating. I realize that I'm being silly and jealous and childish. But I have worked SO, so, so hard to get where I am and it's still not good enough! When will I be good enough? When I have yet another degree? A second job? A prettier face? A better figure? I am just so irritable and angry lately and I don't know how to fix things and I am tired, so tired. I am hoping to be able to post an update this week.