Relationship advice anyone?

I don't know what to do I been with my boyfriend joe for 2 years now off and on we get so far into the relationship then end up breakin up, crying hysterically, then end up back together again n now its happing againand a part of me wants to end it and a part of me doesn't joe's an I r very different joes real outspoken, opionated, judgemental in a sense, and intelligent i on the other hand am shy and laid back n he always corrects my grammer n he says he wont stop because he doesnt want our future kids talkin like idiots n that get me realll me n he said he says he cant stop its how he was raise n he enjoys doing it.. when we talk on the phone or in person he talks about stuff i dont care about and now i feel like im just trying to break free from him n open up n be myself cuz i feeel like 4 the last two yrs i been someone else n just blended in with his personality but now just writing all this makes me want to cry n i just cant see myself leaving.