I can be good , but could I be great ? or better ?

Quoted, good but not good enough happended to pop in my head nowadays. In what ever I'm doing I dont know. I can't be sure of my self either. Out of a sudden I feel so tired, wanted to give up. But then I know I wont, course I won't. Ahh I feel like skipping school tomorrow, much more sleep needed, and some other reason to avoid. In that case, this calls for an excuse for not showing up in school tomorrow. Boleh kah ? Kay that's so pathetic, but my spinal cord hurts, not much just a little. Should be okay I guess, hmmm I really need some one to talk with. I can't think straight. Help me.