not sure about being married

I BEEN WITH MY HUSBAND SINCE I WAS 15. HAD A KID AT AGE 17 AND MARRIED HIM AT AGE 18. THEN HAD A KID AT AGE 19. THERE HAS BEEN ALOUT OF CHEATING IN THE RELATIONSHIP MOSTLY DONE BY HIM. IM NOT GOING TO LIE I DID GO OUT ON HIM ONCE. AND AT THAT POINT I REALIZED THERE WAS SO MUCH MORE OUT THERE. WE BOTH STOP IT AND HAVE BEEN A FAMILY FOR THE PAST 2 years NOW IM 25 years OLD. AND IM VERY UNHAPPY I HAVE CHANGED SO MUCH AND GROWN OUT OF THE KID I WAS. SOME TIME I WANT TO LEAVE BUT FINANCIALY I CAN. IM SO BORD AND HE IS NOT THAT GREAT TO ME HE DISRESPECTFUL TO ME ALL THE TIME STILL.. HE IS VERRY SELFISH. I WANT TO MAKE IT WORK FOR THE KIDS BUT I REALY THINK THE LOVE IS GONE, DONT THINK IT WILL EVER COME BACK. WHAT SHOULD I DO TRY FOR THE KIDS OR JUST THINK ABOUT MYSELF AND SPLIT. NOT KNOWING WHAT WILL HAPPEN?