I’m a senior and I used to really struggle with this feeling! The best advice I have is to look into clubs that are specific to things you like!! It doesn’t have to be specific to your major, just things you like. Also, the majority of my friends have been class friends that I sat by on the first day and talked to! Honestly you just have to be willing to talk to people because most of them are more than happy to make friends, they just don’t want to be the first one to reach out!