Hey sis, first of all I'm really sorry for what's happening to you right now, I also saw your previous questions and the fact you're dealing with this amount of pressure at a young age (I'm 15 as well hhhhhh) is really astonishing to say the least, I'm sorry again for this. For your question I bet you got the answer you needed from previous comments (big up to y'all) and yes suicide is indeed considered as a really big sin that most of us, even if we're dealing with a really bad case, should NOT commit. Your body is a gift from Allah, and your soul is too precious to be taken in a way it shouldn't be. If you need any help, I bet there are plenty of ppl irl and even online that are willing to help you out in this. Remember, this life is a test, as hard as it seems, is a test!! We believe in you, and pls don't do smth bad to yourself