I spent most of my teens and 20s depressed, even though I was a Christian. Depression
comes from hopelessness. About the only thing worse than a bad relationship is to try again only to see the next one crubling as well, and you feel hopeless and powerless. I was a social outcast and felt like I'd just never fit in anywhere.
But eventually I realized I had a choice: to go through life focused on me and what I expected, or on Jesus and what He expected. My social status never really improved much, and it still bothers me sometimes, but I just keep putting one foot in front of the other no matter what. I keep reminding myself that it's not about me, it's about Him.
What you need right now is someone to lean on. Ideally that would be your husband, but since he's part of the problem you need to find some good Christian friend. Pastor, older woman, support group, etc. But whatever you do, don't go to anyone trained in the world's psychology. The Bible contains all the wisdom and counsel we need, but it helps to hear it from a mature believer.
Keep us posted on how you're doing so we can keep praying for you. Even Jesus asked his buddies to pray when He was stressed out. Just remember, "where there's a way, there's a relative". :-)