Hello Friend, Good that you are seeking a help here. As you already experienced, any relationship break up will take time to accept and adjust with reality. In your case, it's more than the relationship issues, your mental stability is the concern. You need to address this immediately as it will make you as a weak or  emotional person in all aspects. Be positive. You can work on this with a professional help.

Your condition calls for immediate attention. Kindly visit a Psychiatrist and a Clinical Psychologist at the earliest. Now coming to the fact that this boy simply left. You are bound to experience what you are experiencing because of the emotional connection you had with him. Give some time to each other. Maybe he also realizes your importance in his life. But if he doesn't. It is not an end of a road for you. You need to come out strong from this. Value other people in your life who loves you and cares for you. Just reach out to a Psychiatrist and a Clinical Psychologist who will help you in this phase.

Hey, you need to give yourself time. Time is the biggest healer. In a year it won't matter as  much as it matters today and 2 to 3yrs down the line you will feel how silly you were. You might even laugh at yourself. Don't go on with self destructive thoughts. There are several people in the world who love you a lot. There will be more you will find in future. More good friends much better relationships. Set yourself a goal. This goal could be completing an education course or a job. And just focus on that. You can best help yourself by keeping yourself busy and occupied. Stop thinking on  "why" Just start accepting that it happened for a reason unknown but you shall come to know how much good this particular situation holds. This unknown reason is for your own betterment in life. Life is beautiful. You are blessed with much more than you acknowledge. Just acknowledge your blessings. Believe in God. Talk to a close friend or relative. Best would be parents if possible.