I will talk about mental health and spirituality. God did not make mankind to be alone.
Genesis 2:18 says, "The LORD God said, 'It is not good for the man to be alone. I will make a helper suitable for him."
It is true that this verse talks about marriage but it can be used as friendship.
So no one should be an loner. Being a loner even if a person is not social that person needs social interaction.
So we need know how to choose friend. The Bible gives people mental and spiritually help for anyone that desires the best life.
Proverbs 12:26 says, " The righteous choose their friends carefully, but the way of the wicked leads them astray."
The person that desires right standing in life need to have Jesus as their Lord and Savior.
The Lord will give that person to pick friends with wisdom.
If a person's closest friends smoke weed, that person will smoke weed. So the righteous person will be careful in their interaction with people.
Many people that don't listen to the Lord or rejected Jesus as Lord. They will go down a path of sexual immorality, drug use and alcohol abuse.
The true believer needs to avoid cancer habits so that believer will be careful in friendship.