I was introverted at uni and it was difficult to make friends initially. So much so that i stopped leaving my room and became pretty depressed. I felt pretty sad everytime I went to lectures and just sat on my own with no one to chat to. I saw other folks socialising and having a great time but i just couldnt figure out how they got in a position to make friends.

Heading for lunch was also a sad affair as it was pretty much just me and my food watching the world go by.

What helped me was to get involved in societies etc. I found making a couple of friends easier after this (though i was still a little shy around women).

The key was to just be myself, not give a shit about what other people thought of me, and to try and enjoy each and every interaction with another human being. I think if you overthink how other people perceive you, it will make it harder for you to make friends. Simply dont give a shit and voice ur opinions (unless they're extreme and illegal)

Funnily enough, as I got older, I found I much prefer being alone and focusing on my own interests and personal development.

I now cannot be asked to go out socialising at the expense of my own insular interests.

Reason I mention the last point is that as hard and lonely university will seem right now, things will get better for you. You may find,like I did, that people are insufferable wretches best observed from a distance.