Feeling Stuck: Socially, Career-Wise, and Maybe Even in Love?

TL;DR: I have great friends and a loving boyfriend, but I struggle to expand my social circle in college. I feel stuck career-wise and sometimes wonder if I’m missing out since this is my first relationship. Any advice?

I'm in my second year of college, studying computer, and I have a good group of friends, including a supportive boyfriend. My social circle is tight-knit, and I’m grateful for that, but sometimes I feel like I’m not doing enough. I’m an introvert, so I don’t interact much with others, especially in my department. When I first started college, people would come to talk to me, but now it feels like I’m stuck in my comfort zone. The college is all about group activities like dancing and singing, which I don't do, so I don’t have the opportunity to expand my social circle like others do.

I also find it hard to make friends unless I meet like-minded people, and honestly, I don’t really like most people in my department. This makes it harder for me to interact, so I end up feeling more isolated in my class. Outside of it, I have friends, but in terms of career growth, I feel stuck. I’m not working on projects or internships to build my CV, and though I'm learning guitar, it's taking time. I sometimes feel lost, unvalidated, and unsure of how to push myself.

Even though I have a boyfriend whom I love so much and who loves me just as much, sometimes I wonder—what if there was more drama? I’ve been hit on and pursued many times, but this is my first real relationship, the first person I actively chose. And sometimes, I have this silly thought—what if I never experience anything else with anyone? I know it’s petty, but it makes me feel left behind in a way, like I’m an adult yet still stuck on these childish thoughts.

Any advice on handling all of this and staying motivated?