I believe that's what they called grow up? I firmly believe there is a big gap between people who are still studying and working people. For your case, you have already expose to the society, and earning your own hard earn money, rather than people who just take their hand out and ask for money. This is a huge different in the mentality and attitude. I know it because i had been through this stage before, and i believe every one will going through this stage too.

My advice, just get used to it and non-stop making new friends.

Best friend does not mean need to see each other everyday, chat on phone everyday or do things together everyday. One of my buddies used to be so close to each other and we know almost every inch of each other, i had lost contact and dint see him for 6~9 years. After all, the faith still make us meet out of nowhere one day, and we are still like old times (18 years back). But of course not everyone be the same, people will change and same as ourselves too.

So my point here is: treat everyone as your buddy and as if it is the last day you going to see them, you will never know what is going to happen next though. This is not easy and it takes time to learn.

I thought that was a norm.