What do I say? Excuses? in Maze of my mind

If someone comes up to ask me what happened you used to be such a great kid OMG you didn’t get in? what do I say? What do I say to them? That I sorry and I am ashamed of myself, that yeah maybe I was never smart to begin with… But that’s wrong I know I am smart I just can’t get myself t osit down and study I have developed anxiety and I absorb almost everything negative but I don’t care about myself. I care about my loved ones, they supported and cheered for me and now iti s the end of all of that. I am officially going to be a disappointment for my parents and it sucks to see your folks sad over you. They are discussing my future thinking and wondering what will happen to me, all I can do is stand outside the door and listen.
What excuse should I give for not working hard enough?? What should I say for wasting a whole year? I have nothing to say