My boyfriend is so lazy  

you could do something like forget to pay the cable bill. that might annoy him enough for him to pay it himself! or you could change your mindset about cleaning and taking care of him since you won't be able to change him. he'll need to want to change for himself. if you go to flylady.com, there are all kinds of hints about cleaning your house. she tries to inspire people to think of cleaning as blessing your house instead of feeling like a martyr that the world is taking advantage of. this strategy helps me to clean and not care so much that i'm the only one doing it, because i have a routine, and i can pretty much do what i need to do in only a few minutes everyday. i don't think the way he is acting is fair to you, but if you are determined to stay with him, maybe flylady can help you somewhat. there is also something called house fairy, which is geared toward children. i haven't paid for the info on it, but from reading about it, it's kind of like the tooth fairy or santa claus for kids. if the kids clean their rooms, sometimes the house fairy will leave a treat. for example, you could buy him a playstation game and hide it in the dishwasher or at the bottom of the garbage can. then next time he does one of those chores and he finds his surprise, he'll be so excited that he might start doing them more often to get more surprises. you could even do cheap stuff like his favorite candy bar or something like that.

Could he be suffering from a mental illness of some kind such as depression? Does he lie in bed late in the day and go to bed late at night, then suffer with insomnia? Does he comfort eat? Does he fly off the handle and get really peed off really quick for no reason? Does he lack get up and go? If the answer is yes then he should see a doctor for some help.

It's hard to be able to give definitive advice when we don't know the full story. I would say sit down and talk about EVERYTHING together and don't expect him to know what you are thinking before you've said it. He might literally need it spelling out for him that you're not prepared to put up with him being this way.

Another trick you could pull is take a week off, tell him you've been made redundant and play him at his own game. Then see how he likes it with no food on the table and no money etc

That can be due to depression or may be he is suffering from low hemoglobin.It happened with me.Whenever my HB goes down i grow lazy.I feel energy less.Is he consuming too much coffee/ tea?That might be the reason.