There are many reasons why we hang out with a particular friend instead of someone else.

Obviously, the biggest reason is because we share many things in common with our friends. And thus, we can feel comfortable being around and talking with them. Our lifestyles and theirs convert more often than not. There are plenty of activities that we can do together. After all, for the majority of the times, we need friends because we want to do fun activities with someone, not because we want to hear them complaining about something (that is just a responsibility that comes along with friendship).

So, imagine you change your lifestyle significantly—you have to train for a better body:

• You can no longer stay up late into the night with your friends.
• You cannot play computer games with them anymore either because you are too busy with schoolwork and eating and sleeping properly.
• You cannot play basketball with them so often anymore because it will mess your training and progress.
• Other lifestyle changes here

In short, you are no longer the same person your friends decided to hang out with back when you all first met.

Now, all of a sudden, there are so few common features between you and your friends while quite a few more discrepancies. The number of shared activities clearly goes down significantly.

Obviously this is not going to go down easy with your friends. They want the old “you” back. They’ll try to persuade you not to train hard, not to sleep a lot, and not to eat too much. In other words, you training and living a different lifestyle is taking away from your friends a long-lasting source of fun. And guess what? People hate changes.

People resist changes.

Environment plays one of the most crucial roles in shaping you as a person and determining your success. Especially when you make a radical decision, the environment around you (friends, family, co-workers, boss, etc.) is the most sensitive factor and thus must be dealt with carefully.