Married Mamas Only Please

So I've been married for 6 years. We have 2 boys, 3 and 5. Pretty much from the beginning, it's always been us and them. No just us. Stress, fighting, money, etc is really getting us. I suggested even having date nights once or twice a week maybe. That didn't work out. The only person that can watch them is his mom. I have no family around here and he has her, that's it. No friends that would want to. No friends period. What can I do to bring that spark back? I'm almost wishing we never got married. We did better when we dated. I know I am the cause of most of the fighting no matter how hard I try to prove myself. Or prove I love him. I cheated. Not once, not twice. Multiple times and I'll always hate myself for it but there is no changing it. I can only work to gain his trust back. What can I do to make it better? I don't want to leave him or him me but it just isn't working out right now. Help please?!!