What do i hear??? Did someone called? XD
Why don't you say , Guru is at work today.
So you want to talk to her.(I talk to girls all the time and i don't have a problem with that.
Here is tut step by step:
First go to hr when she is alone (i mean it when she is in a group other will make fun of you)
Say Hello , Merry Christmas , i got you a present. (Now give her the card , and wait for response)
If the response is good , like thank you ... tell her no problem its in the Christmas spirit , then turn around and say See ya later. ---That's it for now , don't rush to it. So you made the first contact ,and from now on say Hi/Hello everyday to her. Try to talk to her sometimes like when you go to class ask about test or something(Make it up and don't be afraid!!!) so she can see you are reasonable dude ,and not some kind of maniac... Also if you go same way like her when you go home ask her to go to coffee sometimes.When you go to coffee ask her whats up and that's how story/conversation starts.
I hope you will read it whole because i tried hard to explain it to you, and btw when you start to walk to hr you will probably think something like - "why am i not turning around , why am i going to her" and so... then start thinking about some song (really good one) , or how will you feel after you meet her (great felling ,) that will rise your courage for sure.