I Wish I Was In a Great Relationship

Advice on getting out of a toxic relationship while being a stay at home mom? I'm in Texas if that makes a difference, four hours away from any of my own family and friends.... there's just so much, I've been trying to get back into school and he's being less than supportive. I feel like his mom more than anything. I woke up too late to make coffee without realizing the other morning and asked if he wanted me to make coffee for him before work and his response was "it's too fucking late now." It's like that for everything. I'm just so exhausted. If it wasn't for his mom and mine we wouldn't have anything. I have three boys, I'm thinking of just getting an entry level job and leaving, How did you do it?