Im sorry that you've had to deal with this. Your dad obviously has some issues to be ignoring you and not fulfilling his role as a parent to make you feel loved and cared for. But please believe me, suicide is not the answer. Your young, and your about to start a job you love. In this job there will be many opportunities to meet people who could become close friends, people who will care for you and look out for you. It probably wouldn't hurt to see a doctor either, it sounds as though your suffering a great deal and depression could be a possibility. I was very depressed for a long time, now I take medication and it has improved me alot. I was so negative all the time and now I can actually be positive and be happy! Remember, a job means money which means perhaps travel, doing things you love and maybe finding somewhere new to live where you dont have to live with your dad's upsetting behaviour. I promise things will get better, dont overdose there are people here for you. If you killed yourself I would care, trust me. I hope this helped a bit,
PM me anytime you need to talk xx