Re: is it natural ....
Peace bro. (sign of) Divine-Light
Please do not take offence at what I write here it is purely so you can get the best from your situation.
It is understood that you have fallen in admiration for a colleague, a female one, but why are you telling us about this? Unless you intend to marry her should you not hide your feelings as the culture of Pakistan should teach you because that is the culture of Islam?
If you are still feeling attraction and it is creating a fitnah for you then you should fast.
Telling your mother about a girl you have seen may not be a Pakistani cultural phenomenon but it is encouraged in Islam. Marriage is encouraged and so is talking to the person who you intend to marry so you can learn about her requirements and she can learn about yours.
It is forbidden in Islam to make a woman marry without her permission, is this culture being adhered to in Pakistan?
It is not part of Islam to give Jahaiz i.e. for woman to give money to boy's family, is Jahaiz forbidden or praciticed in Pakistan?
It is not part of Islam to have Mehndi is this practiced or not in Pakistan?
Did you know that talking to women is allowed in some instances?
Also, did you know that Muhammad (SAW) discouraged being over shy to an extent that we cannot speak up for ourselves or tell the truth?
There is another thing you can do to stop your feelings for this girl, because obviously it is causing you problems in the classroom. It may affect your work. Think of her as your sister so that your feelings can be controlled, to be shy of her from her beauty is different from being shy of her as a non-mahram.
If you do not intend to marry her then she is your sister, otherwise there is no reason to tell people here about your poetic thoughts about her .... don't you think so?