Am i Depressed?

For the past 2/3 years, I wake up not looking forward to anything , with this "mentality" i've lost a shed load of confidence and motivation . Lacking motivation has really affected me academically in the sense that i was a straight A student and now i'm really failing. Confidence was never an issue but now i look myself now thinking "where are you". In the past year ive began really hating people and this has only resulted in not getting along with people. In all honesty. I hate what people wear, i hate how they talk and how they act. I've made friends with people when not being myself, which has led me to the question of weather "i despise myself"And i think i do but is still depression or some other mental illness??