Sharmi! It's really wonderful how you capture the entire big picture in a sonnet (well, one line more than the usual, but never mind!). it's, quite frankly, mind-blowing! his entire personality, his life, his opinions, his beliefs, everything, is based in those few words.
"Once again" shows how bad things happen to good people (arnav IS essentially good, isn't he?); it shows how never learns from his past mistakes and how much his past hurts him, so in a way he has unconsciously become a masochist.
the words beautifully describe his personality, his life, everything that defines the ARNAV SINGH RAIZADA he is today.
very well written girl!