The Party Partner
A "party partner" is essential. You need at least one wild friend who encourages you to do spontaneous things like go to a late night party or buy something really expensive. He or she will make you feel more energetic and relieve a lot of stress.
The Workmate
Secondly, you also need a "workmate". This friend helps you with your schoolwork or your career. He or she advises you and discusses your progress. If you have a friend like this, you're in luck. This is someone who will help push you, support you and encourage you to do your best. It's a good idea to find someone who is at similar life stage or a bit older. But don't choose someone who is too competitive. You need someone self-confident and generous for this kind of friend.
The Hobby Sharer
Thirdly, one kind of friend who is fun to have is the "hobby sharer". This is someone who you have absolutely nothing in common with, except that at the moment you share the same interest or hobby. If you start a new hobby, like going to the gym, it is much more motivating to have someone to go with. This friendship could collapse at any time but it's very nice while it lasts. The great thing about this kind of friend is that you can start all sorts of new things with different "hobby sharer" friends. He or she can help you move on to a new stage in your life.
The "Tell-anything" Friend
Finally, almost the opposite of the "hobby sharer" is the kind of friend known as the "tell-anything" friend. He or she could also be known as your "three-in-the-morning" friend. You might never have to wake this friend up because you're in a panic about something, but you know you could. This is perhaps the only friend who you show your worst side to and with whom you can truly be yourself. The key to being a "tell-anything" friend is that even though you may not agree with your friend, you are always loyal and always on their side. This is, after all, is what a true friend should be.