Advice!

OK so me and my bf have been together for 2 and half yrs now. And when we argue its over the same stuff over and over again. And its getting to the point where I can't take anymore. We have tried talking about what we need to work on and what we need to do to make things better and it works for awhile then doesn't anymore. And I'm physically, emotionally, drained and don't know what to do anymore. So I need some advice we both want this to work but tired of fighting over the same bullshit.... Please help....