There are people passing by times in they have less friends or even anyone.
It would be for many reasons like: move, a moment of stress or depression,a big change in their life or to a toxic relationship that has made them lose confidence in others.This does not mean they can not have friends in the future,neither that person is wrong or bad people.

Everyone love you when you are in good mood and you are having a great time and the most important thing is that you are helping them out. Can you say the same thing when you are in bad mood or having hard times? How many people are around you?

Some people are the kind that leave when you need them, but they get back to you when you are ok again.Then, if you don´t want to answer their greetings automatically you are a bad person.

There are people GOING THROUGH times in WHICH they have FEWER friends or even NONE.
pasar algo = going through something

It COULD be for many reasons SUCH AS: A move, a moment of stress or depression,a big change in their life or *A* toxic relationship that has made them lose confidence in others. This does not mean they CANNOT have friends in the future, NOR DOES IT MEAN that THE person is wrong or THAT THE OTHERS ARE bad people.

Everyone LOVES you when you are in good mood and you are having a great time and the most important thing is that you are helping them out. Can you say the same thing when you are in bad mood or having A hard TIME? How many people are around you?

Some people are the kind that leave when you need them, but they COME back to you when you are ok again.Then, if you don´t want to answer their greetings you are AUTOMATICALLY a bad person.

get back = responder (I will get back to you tomorrow with an answer)
come back = volver, regresar