OK, this sounds like a nightmare situation - I've been there myself. Not quite the same scenario, but one which involved similar amounts of stress.
As I see it, it doesn't sound as if your boyfriend fully appreciates how low he has brought you emotionally. Because he sees your repeated requests as nagging over nothing, the situation has the potential for disaster. You'll get more stressed, and he still won't understand why.
You need to spell it out to him. Don't say "I'm upset because you won't do this or that". Say you are miserable and you don't know how to rise out of it. Tell him how stressed you are, and you feel that if things don't improve, you fear for your future together.
Once you have his attention, tell him why. Tell him that it might appear trivial to him, but it's the little things that add up to one big nightmare. He might have to put himself out a little to help out around the house, but surely it's a small price to pay for your peace of mind - and your relationship?
One of three things will happen:
1 He will finally get the message, pull his weight and you can both move on with your lives together.
2 He will carry on making a mess as before regardless of your feelings.
3 He'll improve for a day or two - maybe a couple of weeks - and then revert to his previous behaviour.
Result 1 = Great. Good luck!
Result 2 = You have to ask yourself if you really want to be with someone who doesn't care about your feelings. If you have told him exactly how you feel, surely if he cares about you at all, he will want you to be happy?
Result 3 = You might have to go through all this again, and possibly give him an ultimatum. Two strikes and he's out? No one said it was easy.
I know all this advice is easy to give. It's always easier to give advice than act on it - I hope it helps you get things straight.
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