Is it normal to......?

My hubby and i have never really been "OK" I mean we love each other emensely and have just celebrated our 10th year anniversary we are still both young but we never go through a whole week without having an argument and i dont just mean a little bicker i mean a blazing row usually!! There's a lot of heartache and sadness that surrounds our relationship and we have some bad history behind us that i dont think eigther of us can forget. We've been to 'relate' and it did work we are a lot better now than what we used to be its just i feel like we're fighting a loosing battle. When we make up we say oh lets just put all that behind us and 'start again' but how many 'start agains' can you have?? What i really want to know is, is it normal for me to think about splitting up all the time? When were not arguing nothing is further from my mind, but when we do i just want to be on my own? Is this normal and does anyone else do this??