Why does he break up after every argument?

I have been with my boyfriend 11 months now. We fight sometimes, not to often. He has broken up with me a few times in the past because of arguments, he says we just can't get along. We both end up not being able to kick the heartbroken blues, so we try to address the problem and work on it. I believe we sincerely do love each other. This helped for a few months until recently. He broke up with me again and said it was for good this time, we just could not get along. Its been a few days and we are gradually starting to talk things over again. The last time this happened we made huge progress in our relationship. Should I try to keep progressing for the sake of our love or stick out the heartbreak and move on? I have no idea what it "really" means when a guy takes the easy route out and breaks up. h knows its immature also. can he change that? Help!
Why does he break up after every argument?
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