Immaturity

I just told my friend about my problems which are I'm late always ( late to classes or work and late to dating with friends ). Besides that, I sleep late always ( I sleep around 2am - 4am ) and get sleepy and tired at classes or at work. Other than that, I always study at last minute for my examinations in the college which means tomorrow I have exam then I only study today or one day before exam. I don't study everyday or regularly. Then, I'm not good in calculation subjects such as mathematics, accounting, finance and so on.

Guess what my friend replied? My friend replied " the problem you have mentioned is usually occurs in kids.and you are 23 years old?

I was like so surprised with the answer == I think I need to think properly about these problems and correct them as soon as possible. I want to be mature!!!