How do I get out of a marriage when I don't have much money? Should I stay? Save up to move?

I want a divorce but I don't make enough money to support myself. My husband and I haven't had sex in almost 13 years and he won't even try. We separated for 4 years because of it. We tried counseling and doctors to no avail. People say he must be gay... We got back together a few months ago because I felt divorce is a sin...And sit or get off the pot, ya know. But nothing's changed. I know no one is perfect. But here's another thing: my husband is dirty and messy. He doesn't shower or brush his teeth enough. I look at him and think Ick. He's very overweight and doesn't care about his appearance. He smokes, he smells. (Plus, he's a lot older than me and he's not aging well). Yes, sex is that important to me...before anyone asks. What do I do? Save up to eventually leave? What...?