Just getting lonely up here.
Hi! Never been to UCSC, but I’ve attended to 3 new colleges in the past 2 years (I move a lot), so I feel your struggle SO much. I struggle with really bad social anxiety so its extra hard for me to make new friends and get out and be social, I’ve got some generalized suggestions for you that may be helpful. As cheesy as this sounds, join a club. Yeah yeah yeah, I know, everyone says “join a club”, but for real, that’ll be the best way to do it. Go the first time and sit there awkwardly and make offhand comments about the weather and stuff. The more you go, the more friends you’ll make. Talk to people in your classes like “oh are you ready for this test” etc. Go to your campus gym and workout. Even if you know nothing, get on a treadmill and start running. The more you get out and be social, the increased chances of you meeting people is. I know its scary to put yourself out there, but thats the only way you’ll make friends. Good luck 
I spent the first two weeks of college alone in my dorm, and honestly, it’s not for everyone, but consider joining Greek life, even if its an academic/service frat or sorority. Even if rush is over at UCSC you can still do informal recruitment. Its how I met my closest friends on campus, and without it, I would still be alone. If it’s not for you, try joining clubs and getting involved in the community. You got this!
My D tends to be a loner who doesn’t want to be a loner. She finds connection through part time work. Clubs, Greek life, and sports are not her thing, so work has been her way of meeting people outside the classroom.