I agree with Katie that sometimes your residence hall provides the opportunity to become friends, but sometimes those roommates or neighbors may not be a good fit. Besides freshman orientation, colleges have activities fairs and student unions with activities offices with information about dozens or hundreds or even thousands of clubs and activities to get involved in. You can also probably find most of them online. Religious life offices may be able to steer you to services for your faith, or to interfaith services. There are also fraternities focused especially on community service. I found most of my college friends in an activity I enjoyed and in a special residence hall I applied to.
Remember that hundreds, if not thousands of other students are in the same boat as you. They also want to find friends. Try new things and go to some you know you will enjoy, and you will likely make some great friends. It’s okay if this takes a little time. However, sitting alone in your room instead of getting out there will likely prolong the time it takes to make friends. Don’t be afraid to ask someone to go to lunch with you or study together for a class, as those things also lend themselves to new friend opportunities.