What to say

A friend of mine told me the following today:

- I dont like who I've become and I´m afraid of who I can be...

That scared the shit out of me, what am I supposed to anwser to that? As I was trying to figure out what to respond he continued with

- ...and then I realise that tomorrow I will wake up and still be in my life...

That really really messed with my thoughts and I still dont know what to respond but I have realised that I pretty much feel the same sometimes