I feel miserable in my relationship.. advice

Here’s some background - we’re both 22, have 3 kids together, I’m a SAHM and he’s the one with the income, we have been together for almost 5 years

To keep it short, there’s quite a few things in the relationship that I couldn’t handle anymore. He promises over and over he’ll change and never does, which I’ll bring to his attention and his response is “I’m just lazy, but I’ll do better.” He has been on me continuously about having sex but I just don’t even feel sexually attracted to him anymore. I want to leave but I can’t. I have no drivers license, no job, nobody to watch the kids for me to get a job (I have a newborn, 1 year old and 2 year old). I’m stuck and miserable. Even some words of encouragement would help at this point