My boyfriend says he's getting tired of me!

Well first, we have be dating for about 5 years on and off, but knew him for 10 years. He is a very sweet guy, its just sometime when he doesn't get what he wants he starts to go crazy. He is diabetic and I try to deal with it by helping him but he doesn't take is medication. He never use to be a breakfast person. Now he wants me to make breakfast every morning but that is not a problem to me I do whatever he wants. There are sometimes I will skip a morning if I am running late to work. He starts to talk about me to his co-workers and they gave him advice to leave me since I'm not cooking breakfast everyday. So he says he is started to get tired of me, but in my mind I know it's not just this petty issue it has to be more than that. What should I do?
My boyfriend says he's getting tired of me!
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