Love, love, love the post, Mona! I don't know why, but the way Shravan's character is etched (warts and all), has always intrigued me more. Maybe that is why I have spent more time thinking about him and his pain than I have spent on Sumo's trials.
Both of these characters are beautiful, because of their limitations. No outlandish greatness in either of them. Complex, flawed individuals who carry their grudges and grind their axes, but also love with abandon.
When we bring up the "Shravan Malhotra ka bharosa jeetne ke liye koi kya karein..." we also need to remember that the bharosa had been won, and then squandered. Which led him to once again question the utter core of their relationship - their friendship.
You know, I cannot put the burden of action on Shravan alone. Yes, he hasn't been able to or even tried to read her silence. Neither has she tried to give him the security that he needs, even the knowledge that she cares (forget love), to prod him into action. Trying to make an already insecure person jealous will not get us the nirvana we crave J. It will only worsen the situation, as we've seen.
They both carry considerable baggage. And I strongly believe that they BOTH must give some to get what has been theirs all along. Just one tiny step - that's all is needed.