Mewzik & "have i changed?"

Mausam Kaur Hi!
I knew there was no other therapy which could help me get out of the prolonged bad mood. So I decided to opt for the remedy which had worked with cent per cent positive results, music.
Out came my much cherished CD case and I copied a few punjabi, a few hindi songs to my computer (since the time i have come to US, I rarely listen to english music) . Whether it was Satwinder Bugga, Harbhajan Shera, Kailash Kher, Atif Aslam, Jal or Nachchattar Gill, all contributed.
8 hours of continuous music, did help in the end :-)
One of my bro's friend came to our house for the first time today. I did'nt even know of this friend's existence before he came in, so I thought he definitely was not his best buddy types.I was sitting in the adjacent room when he came. Under normal circumstances I would have left whatever I was doing and would have gone to greet and welcome the guest but today I decided to carry on with whatever i was doing.
After a while our guest glanced into the room, i was at the farthest end of the room and we exchanged pleasantries with a simple american "wassup!" without any smile. With that act of mine I surprised not only my mom but also myself, coz this was not the way how I used to treat guests.

Have I changed as a person since the time I came here? I reasoned myself about my action that " He was just an acquaintance and I should continue with what I was doing rather than spoiling my concentration."
I strongly believe that I am too stubborn to change, just coz the country where i am these days has changed, but what if I am wrong?
Regards,
Ajj Kaim Singh