Depression and anxiety

Hii, I'm 21 and have been thinking about suicide alot. I have been depressed since I remember. It's hard to explain things to my parents. I'm not doing good these days. As a kid I used to give myself lots of time to recover but it's not same now. I have exams and a career to think of. I spend all my days in bed starving my self. I can't keep on doing this or I'll end up with nothing at all. I do t have time to recover like the old times. I need something faster or I'll loose this time and no job. Even though I am talking so much about it all but i still can't study at all. Not even able to pick up a book. Please someone help me.