Anon,
Friends are different.
You can have friends who you might hang out with and have a laugh with, who might not be there when you are going through a tough time, and there are friends who you might not have as much in common with, who are quiet, and who you don't hang out with as much, who might be the ones who come through for you when you need them. We don't always know the people who will help us in a crisis and who will show themselves to be better friends than expected!
Give your friends some time, don't apply unrealistic expectations (they haven't known you for that long and they are adjusting to life at uni too – you also might not know what is going on in their personal lives) and wait to see what they are like when you need help or when you are stressed. They might really come through for you – if not, at least you will know the level of your friendship.
All the best,
Oluwatosin – 2nd year student – University of Huddersfield