Is this depression???????

i have been very weak in studies since childhood and because of that my teacher had always punished me ......almost everyday ..i was also not able to make friends that time...my parents have also preasurised me to work more on studies so by the time i was 13years old i tried to commit suicide almost thrice but nothing happend....after a year or so i started gainig weight which made my life worse...... i am 17 years old right now and weighs around 85-90 kgs .......all my clmates tees me ....i have no friend even i am not good at studies..... my family always says that i am a burden on them and are ashamed of me....my brother-sister always dominates me my life has become more than hell.....nowadays i am not able to sleep more than 1-2 hours a day...... everynight i wake up and starts thinking about my life and cry throughout the night .....i am also not able to eat anything ....i get suicidal thoughts .....even i have tried it but but didn't sucseeded in it........now after one month i have my 12th boards ....and everybody is saying that i will not be able to do anything in life ...... i feel like running away i want peace... and i could only see one thing for getting it that is death....plzz help.....!!!!!!!!!!