Try leaving your dorm door open (while you’re there). People might stop by and say hi.
Go to the welcome week events!
Eat dinner in the dining hall - join a group of people that look interesting.
Go hang out in the student center, try to talk to people.
Find a club or group that matches up with your interests, and go to their first meetings.
Friends won’t find you if you’re sitting in your dorm room - you have to go find them.