There is this guy in my course and we are both 19 whenever I look at him I catch him looking back and he added me on Facebook in the 2nd week of our course. Then we had a party and his friend came and told me come on let me introduce you and I was like if he wants he can come and not me but apparently he is really shy. His friend told me that he has been mentioning me for the past 2 months. We didn't talk at the party as I was shy to go and talk to him and he was too in fact when his friend was trying to force him to come he told him I am going out and he left for an hour. Should I chat him on Facebook? Because his friend told me to do so as he said that this guy will never talk to me as he is way too shy. And any ideas of what I should say? Because we both know we like each other and I don't want it to be awkward

Tell him you're sorry you didn't get a chance to talk to him at the party and then ask how his week has been.
You have to start somewhere. A closed mouth does not get fed.