@peaceful,
Then ... stop saying it.
Really, you do have control over the words that come tumbling out of your mouth.
Now, do you think you will leave this guy? Are you having a lot of fights? How do the fights go? Are they fair, or below the belt? Are there a lot of things blown out of proportion? If you are in a bf/gf relationship and (and I don't know the details) not living together, chances are good that there isn't much big to fight about unless there's been infidelity or suspected infidelity. But for people who aren't engaged and aren't living together, there tend to not be roommate-type things or money issues.
Think about this. If there are a lot of big fights now, without the big commitment, what's life going to be like if you do commit to each other in a much more permanent manner?
Perhaps your own means of fighting is trying to tell you something.