No.. he is not being insensitive.. was Sana being insensitive when she was all over Gautam? No..
Shefali came to hug Sid.. It's not like he ran into her arms
What did Sana say to Sid..karne de na Jo main kar rahi hoon.. tujhe kia farak parta hai.. why would Sid not meet someone who he has known since quite a long time? Ye kesa logic hua?