I finally know her name - Regina :)
Honestly, I didn't really have a good impression of her before this. I tried my best to be friendly and greeted her everytime I bumped into her in Uni. It is probably my height problem, she is extremely tall and hardly notices me even when I walk pass her in the corridor in front of our rooms, which explains why she ignored me the every time I smiled at her.
She started to smile and greet me every time we saw each other ever since yesterday, which is good.
I realize, sometimes it just takes us a little initiative and slight effort to get to know somebody, which just might make a big difference to that somebody.