Stuck in the mud

Ever been in a position where you feel like, no matter what you do you cant change the situation or find a solution to it? Lately ive been running in circles for the past 5 months, with the relationship im in and usually, We can sort out the problem and move on, but this one is bigger then both of us. I feel like Im the only one trying to break through.. through this web of constant dissapointment? I know we all have problems, and as much as wish we could, we cant change another person. When the big picture starts to fall apart we'd hope that, it would be a wake up call, to find a way to keep it together. In this case its not happening, Ive put hard work, dedication and sweat into believing we can get through this.. together! When this one person keeps repeating the same mistake, you become restless and start to think, maybe this isnt the best thing for the future. After 4 years you hope that it wouldnt come to this, but Im already at the edge wondering if I should, let go and find happiness else where? Or keep holding onto the current situation thats getting us no where? Im broken and cant keep it together..