помогите, пожалуйста, полагаюсь на вашу помощь!!!

Hello there!
Ive just read the problem page in your magazine and all the advices youre given here (it keeps my spirit up!). So it мейд me take some paper and just write you about my situation as well.
Firstly, I need to point that my problem is quite difficult (I think so), because I dont understand my feelings, wishes and emotions completely. Thats why I hope maybe youll help me to figure it out.
You know, I just dont want to do anything. I feel lazy, not motivated and sad. The problem is that I understand it very well, but still, I dont know how to get rid of it. This situation makes me sad, because I have my exams very soon and I just dont want to study hard to pass them. My mum gets angry about it (although I understand her) and we fight all the time. Because of that I dont feel calm at home, the atmosphere here is really annoying. By the way, my mum says that its just a difficult age. They call it puberty, you know. But I actually dont think so, because I understand and see myself from inside better. Maybe I am just really lazy? Not responsible? Not ambitious?
Could you help me with my problem, please? Tell me what you think about it. Tell me how you see this situation from your point of view and give me some advice. Id greatly appreciate it.
Thank you in advance!
(Your name)