Homeopathic meditation without taking proper history is not recommended. Meet a counselor for emotional assessment. You are young and its OK to have moods. Don't let them disturb your routine. Talk to friends and share with family about your feelings. Be vocal and also introspect why this feeling has sunk into you.

Start with homoeopathic remedies. CALC. CARB. 1M 1 powder at night before sleep. Keep powder on tongue and swallow. From next morning, IGNATIA 200. 4 pills x 3 times daily x 30 days. Come after 30 days.

The more u isolate  the more loneliness  is what u r going to feel. Try to analyse the reasons behind your anger. High expectations  leads  to irritation and Anger in general to anybody. If u feel u r not able to resolve it by yourself do consult a Psychologist and handle this issue at the earliest to lead a cheerful life at your age.

Depression does make you go through lots of negative thoughts often irrational, but automatic, leading to  negative feelings, hopelessness, lack of energy, motivation, enjoyment, concentration including impaired sleep, appetite etc. It is important to find the underlying cause, severity of depression and the impact, which will help to determine appropriate treatment. You will benefit from cognitive behavior therapy to develop some techniques and skills to overcome negative thoughts and feelings. Severe symptoms will need medicine. Lifestyle changes like yoga, meditation, practicing mindfulness will also help. Consult a psychiatrist in person if things are not improving. Regards