Uni is extremely different from high school... But each uni experience is also vastly different...
My uni was the kind of place where the people were either way too nerdy or way too outgoing so the first couple of months I felt out of place as I couldn't find a midpoint... Then I did and I was very happy

kept making more and more friends, and the last one I made before leaving, I fell in love with lol
It's just a unique experience... I don't miss high school at all to be honest, and really want to go back to uni asap!