I'm bad at socializing at school lmao

In my career I only have 1 friend, the others are acquaintances (idk the right word ok) 

My friend is pretty and smart, like she's the best at studying and working!! she's also pretty funny and I enjoy spending time with her, even if I only do that in classes and not in recess. It has been 3 weeks since the semester started and I know that it's difficult to adapt to university and well, make new friends, but all of my classmates seem really close to each other and I feel like I'm kind of missing out. I have eaten my lunch alone since like, the final year of high school and I don't wanna feel lonely ;-;