I don't know how to cope?

So my life has gone through complete hell lately. My dad is very ill, he has had a neurological disease (that cannot be diagnosed) that devenerates brain tissue, causing his brain to slowly die. Now he just recently was diagnosed with cancer. He has maybe 6 months to live, if that. I'm only 16 and he has had the brain illness for maybe 15 or so years(although its gotten bad in the past 3) I never really knew my dad, but I see him every day, falling apart. It eats away at me. I can't live like this. There was a point in my life where I thought about suicide, but I know there are no anawers there. I just wish I had someone to talk to, but I can't trust the counselors at school because in the past, I did and they lied to me, so I can't ever feel comfortable with them. I have never had any sort of relationship(girlfriend), so no support there, I have been alone in what I'm going through and I feel like maybe this could help. What do I do? I mean I've told a few close friends, but none of them understand, and even if they did, why should I impose all my problems on them? How do I physiologically/emotionally cope with this?

sad to hear about what you are going through,I will give you just moral support boy do not commit suicide sickness is part of life and have faith,God can do anything God can heal him.

I would like to explain what I went through 3 years ago, my mother broke her neck 3 times in less then 3 months, she became completely disabled, my son was also diagnosed at this time with a MS and I had to deal with, as well as take care of my mother. I took care of her and was working a full time job. I was to the point that I was ready to give up because I also, didn't know how to cope with what was going on. I was going on stretches where I hit 70 hours of no sleep. It was so exhausting for me physically and well as it was mentally. I can only say to you, please do not give up, do the best you can do for your father and cherish every second you have with him. I got the help from a local organization for elderly and disabled people. They sent nurses from the hospital to help take care of her, freeing me up to get some much needed rest for a few hours a day. Watching my mother suffer was so devastating to me and nothing I could do to help her, but take care of her. Today I am happy to tell you, she is well and walking again, after to major surgeries. I was lucky she made it through, I know your father won't for that my heart goes out to you. There are church, support groups, and organizations out there that will give you the support and help you need. Please don't hesitate to contact them to get support for yourself, so that you can be there for your father.