My parents didn't understand either when I was your age. I did get through it and I'm still here. Mine understand a little more now but some people just can't get their heads around it. Do you have counsellors you could talk to at school? Remember however bad you feel, time still passes and the last few weeks of school will pass. Don't worry about the smile, but however hard, going through the motions helps time pass and your recovery will be nearer. You showed strength getting so far and all you can ask of yourself is the best you can do now. Other people may ask more but you know how much you tried. Do speak to a counsellor if you can, I didn't and that was a mistake. Safe hugs