College won’t magically change your personality, that will still be a part of who you are (and that is okay!), but it does provide significantly more opportunities to socialize than high school, more people so that you can find your niche, lots of opportunities to explore your interests, and a fresh start because everyone is new and looking to make friends. With few exceptions, college is much less cliquey than high school and people are much more wiling to spontaneously create new friendships.
You can choose and determine how you live the next part of your life. I was always more on the introverted side, and would choose to read books on the bus and sometimes during lunch, rather than engage in group conversations, but was generally friendly/sociable when people approached. Over time, in high school through journalism and talking to people in clubs I got to know much more people. And in college, people are surprised when I tell them I am an introvert and I have gotten to know a huge swath of people that I would have never imagined years before.
But I am still more content spending time with a small group of friends rather than going to a party, and there are people that I enjoy more than others. It’s all about building those relationships though. As an introvert, who prefers one on one interactions, I have found that I have built many of those during my college career, have a core group of freshman hall friends who became my “posse,” and have prioritized the people in my life.
The next couple years are up to you. Get involved, meet people, care about people, make lasting friendships.