I think you're being a bit overdramatic by saying you should die, etc. Nobody deserves to die for things like this - maybe seek out some counselling if you're genuinely feeling that way so your thinking is a bit healthier. You can't be expected to achieve anything with an attitude that just makes you want to die or quit as soon as something goes wrong - instead, a break to sort your head out and using it as an incentive to work harder should be your goal.
It sounds like you're really not trying at all which suggests you don't care about your degree, or studying in general. Do you need a degree for the current job you're doing? Could you not work your way up somehow given that you've managed to get it? I mean, at least you have that as opposed to a degree and nothing else - so that's better than nothing. If you haven't spoken to your tutor much about what's been going on, I'd suggest you make use of him/her - that's what they're there for, and they may be able to provide more useful advice as to what you should do next and where they think you might be going wrong.
As far as other people are concerned, just tell them your course wasn't for you and you want to pursue your job, and take a break from education? Personally, I would have done so after failing the first year which might be a bit more believable rather than waiting the full three years, but that can't be helped. It just seems as though you're wasting your own time here. And your parents are your parents - they should love you no matter what, even if they do feel disappointed with you at first. As someone else pointed out, you're just spinning yourself a web of lies which will just make things more difficult to get out of... I can't believe you managed to get away with not telling them about a repeat year, but I guess if you're away from home it's a bit more understandable. They could have provided a bit more support when you were feeling low, but it seems you just got used to your lazy lifestyle rather than actually doing any work. It's best to pay the price now though and avoiding any further problems - you've already used up a few years which could have been better spent, but I guess it's all part of the lesson.