Just want to give up now!

I'm fed up with everything. My diabetes, my mental health, its just all getting too much. None of the medical professionals really care about me, I emailed them saying I want to die and that I was depressed, and felt like I wasn't going to make it to Christmas, none of them cared, one of them changes the subject, and the other doesn't really do much to help me and the third just thinks giving me "happy pills" will be the end of it. 

The diabetes nurses always talk about my blood sugar and my insulin, they don't talk to me about the serious stuff. I think I might just end it because I am fed up with not being cared about. All I wanted was to talk about how I am feeling for a change and they make it out to be "your blood sugars are high thats why you are depressed" they don't understand the fact that, I had mental health issues before I was diagnosed with diabetes. 

It's getting me really angry, and I am the kind of person who never forgets what people have done to me. I sent them both an email on Friday, asking about a new pen I have and about how depressed I am and asked them questions that I don't understand and told them that I don't think I can make it to Christmas, none of them have even bothered replying to me. 

I'm done with this world. I'm done with them. I just want to end it all and then I will finally be happy. No one would miss me anyway, so its not like they will know im gone. 

It's got to the point now where I don't take my insulin because what's the point when no one cares. I certainly don't care whether I live or die, not anymore. 

It's always kids who get the transplants, the insulin pumps, not the suicidal people who will kill themselves because of diabetes. No one cares for people like me, I will prove to them that I don't need them. Because if I kill myself, they will lose their jobs as I will write letters to the police and their manager! 

I'm so angry I can kill someone right now! Someone help before I snap?!?!