A little background info: I'm 21 years old, a commuting college student, and I don't think I'm particularly close to anyone except for 2 girls and my other guy friend. I do have friends, but I feel like my shyness and social anxiety inhibits me from making good friends as opposed to acquaintances. I wasn't really this way in high school though, which makes me dislike college even more.
Are you guys also the same way and is this something I should be very worried about?
Are you guys also the same way and is this something I should be very worried about?

I'm a college Freshman, and my good friends live on the same floor, or near my premises. We're always interacting with each other, learning about our personalities, and getting into arguments.
There are 5 of us, and we're perfectly content. Why don't you try living in the college dorms? they kind of force you to socialize.
You say you weren't this way in high school. Do you mean you were close to a lot of people then?
I think sometimes people appear to have more friends or be closer to more people than they really are. I wouldn't guess it's actually all that common to have a lot of truly close friends.
If you think there's a problem and it's that you've become more shy, then there's your answer as far as what to work on.
I do think three good friends is a perfectly normal number of them to have, though.
Start off by sharing the same bench then keep inching towards them till they notice you and Kablaam either they will pull away or they will also move closer.
Some people you will automatically connect with, others will take time. But honestly, college is the best place to meet people, even if you commute. Find a job on campus! Or join clubs or go to meetings or attend speakers. It make take you some time to adjust but you will learn that most people are cool and at the very least talk to you. It'll help you figure out how to best approach new people and you'll find that making new friends isn't anxiety producing.
*leaves a present inside the bubble**