Dropped out

My elder brother dropped out of college a year ago. it is a pity that he almost finished college! my entire family didn't understand. my brother is kinda a inward person and hide his feelings deep deep down. i always wanna know what's happening, and he just avoid conversation about that. if you don't mind, can you tell me the reason of quitting college? i think it will really help if you open your heart and tell people about your situation. maybe in the process you will figure out something and feel much better.