Looks like you are having a tough time with your relationships. Relationships are not always straight, happy and peaceful in life. Ups and downs, extreme mood swings, black and white thinking is expected to be a part of life especially for teenagers. I suggest that you postpone the thoughts of committing suicide for a while and see a counselling psychologist to learn how to manage relationships more effectively.

I understand your distressful situation. You seem to be suffering from depressive symptoms including mood swings and suicidal thoughts. However more clarity is needed regarding your problem. Information regarding your sleep, hunger, energy levels, interests and concentration at whatever you do would be more helpful to decide on the severity of your condition. Don't worry it is not your fault, it is the hormonal and chemical fluctuations in your brain as a result of stress which is taking a toll on your mental health. It is easily manageable with appropriate treatment, so that dysfunction due to the same can be reduced and your quality of life will improve. Some counselling sessions and if needed medical help might be useful for you. I would also be more than happy to help you with that if you are looking for online assistance. Discussions will be held confidential. You can directly consult with me through Practo as needed. Online chat consultation is also available.