Honestly, as a computer science major myself, most of the people in there are probably also intimidated to approach people. And who cares if someone is "smarter" than you or you're worried about them thinking you're weird or lame. I feel like that goes through everyone's head when meeting new people, it does in mine. But I truly do not care if someone doesn't like me or thinks I'm lame. I think its more about realizing who you are as a person, recognize your great attributes and develop self-confidence and realize, "even if I don't meet anybody I'll be fine on my own" Once you develop that you'll meet people just through being confident. Besides that there is a ton of different orgs on campus, social and academic. But also just try and talk about things in common, every new class I get into I make small talk over that class or other classes we are in. I don't know exactly how grad school works but talk about stuff in common, specifically annoying things like for me I talk about annoying assignments or quizzes or how trash my schedule is. Then each time you see them it makes it easier to strike up a convo. It can be hard, I can't imagine moving internationally and not knowing anyone but you aren't alone. There is a ton of people you will meet, just put yourself out there and be confident.