Was he a good guy?

my boyfriend of 4 years broke up with me two days ago. we usually have fights but never like this. In the beginning he promised never to hurt me and the only reason we would break up is if one of us cheated. the fighting started when a girl at his work broke up with her 7 year boyfriend and they started messaging outside of work. of course i knew nothing of this since this is the time he stopped talking to me. Now he hangs out with her all the time and shit. When i asked why, he said he had to much on his plate, that this relationship is added stress and that he doesn't love me anymore. this is only my side, but I'm heartbroken and scared that there isn't any good guys out there.
Was he a good guy?
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