Pretend you are not shy, like to meet people and are chatty.
Fake that until you are comfortable introducing yourself, saying hi to everyone in the hall, and saying yes to every invitation to eat together, check out places on campus, and go to lame dorm parties.
You stop hiding behind the I'm painfully shy persona and take this opportunity to blossom into the person you always wished you could be.
Force yourself to put yourself out there.
How do you make conversation?
You ask them how they like the dorm, dorm food.
Where are they from, what's their major, things you wish people would ask you when you are at a party or function.
Make eye contact, smile, and DO NOT say you are shy.