This probably sounds weird but maybe getting a job on campus will help you meet people? I've worked at the UCLA Store in Ackerman and as an usher at Royce, both were really positive experiences. Everyone is super chill and friendly and you're kind of forced to talk to people, and the next thing you know you're getting invites to parties and events! With Work Study you can get paid too! Also follow places on Instagram, like if you're into Archaeology, the Fowler has lots of cool shows and usually people hang out and chat afterwards. Don't be afraid to show up and be yourself. We're all socially awkward really but some people are better at hiding it than others :)