These days it is not just about knowing that you ought to choose your friends wisely; you should be able to recognize the good friends from the ones that are not worth your time and emotions.
However, it is not always so easy to sift the wheat from the chaff. Some people are sneaky but no matter how good their acting is, there are signs that will always give them away.

1. They never forgive
With relationships, offence is inevitable but some 'friends' would hold on to every grievance, no matter how little or how much you apologize. A true friend won't risk losing the friendship over trivialities.

2. They only reach out when they need something
Of course, your friends should be free to ask you for help but fake friends latch on to you only when they need something and disappear when everything is fine.

3. They are jealous of you
Oh, you gotta run! It may not be so obvious but watch how your friends behave when you have something great going for you. Also, if you are observant, they will let the true state of their hearts slip.

4. They get angry when you say 'no' to them.
I know of a lady whose friend always asked her for money and whenever the lady said she didn't have any to lend, the friend would be offended. This is a fake friend. By extension what I am saying is that a true friend will be understanding.

5. They don't respect your opinion
A friend who makes you feel like you don't know what you are saying is not someone you should hang with. You two may have differing opinions but there should be mutual respect.
The signs are endless. Anyone who gossips is also one not to be trusted. Overall, remember to trust your instincts about people.

https://www.nigerialog.com/family/signs-of-a-toxic-friendship/new/#new