When I was younger, I always envied people who had their one specific tight-knit group of friends who they did everything with. I have come to realize that as fun as it may sound to have a real life group like the cast of Friends, it's better to have multiple groups of friends that are all unique from one another. Personally, my groups include my childhood friends, to college dance team friends, my high school friends etc. There are many reasons why I think having multiple friend groups is better and more beneficial than having just one.
Multiple Opinions
One of the best reasons to have multiple friend groups is that you get multiple opinions. Whether it's trying to decide if the guy in you history class is flirting with you or what to eat for dinner, you know you'll end up with the best option after hearing from so many different points of view.
No Fighting
It's pretty easy to get into arguments with someone if you are with them 24/7. When you feel yourself getting some animosity towards one of your friends, you can easily remove yourself and take a break by hanging with another group instead. If you need to vent about someone in your high school group, you could go to your college group and get an honest, outside opinion. This allows you to take some time away and prevents many arguments.
Different Personalities
As someone who tends to get sick of people easily, having multiple friend groups allows you to constantly be surrounded by different personalities. Being around so many different personalities also teaches you how to interact with different types of people.
Pressure
I personally don't think that it is healthy to rely on one person for everything, let alone one group. My friend groups were formed at different points in my life. I have unique experiences with each of them which causes me to feel more comfortable going to one group about family drama over another who I would typically go to for boy advice. It can also be a lot of pressure to have to be someone's sole source emotional support. By going to different groups for different things, you allow your friends to take a breather from your drama as well as yourself.
Sometimes, having such a variety of friends, can be stressful when it comes to planning big gatherings like my birthday. Deciding if I should do something separate with each group or if I should just put everyone together is always a big process. Even if my friends may not all hang out on a regular basis or even be each other's biggest fans, at the end of the day, all of my friends can hang out together for my sake no matter which group they belong to.