People can be mean

Relationships, be they friendships, or romantic, are uneven.

Right now, I'm talking about friendships.
In the relationship, there is always someone who likes the person more than the other.
You compare it in percentage, kind of like 40%/60%.

We expect more from others, because we would be willing to do that much more for them.

People are selfish, inconsiderate, caring, compassionate; all in different amounts.
Some people are more selfish than others, whilst some are more caring and giving than others.
It's how the world works.
It still sucks.

People do things, say things, without thinking, and don't realise how it may or may not affect other people.
Saying something in a harsh voice may upset someone. Saying something with no emotion may upset someone. Saying something happily may upset someone.
It's so easy to upset people, and we don't even think about it.

We all do and say things which affect people. Sometimes it's people we know, and sometimes it's people we don't know, like a person on the street or in a shop.

I think people should seriously look at themselves, try to put themselves on the receiving end of what they say, and reconsider how they act and/or what they say.

It can be something small, or something big, which upsets someone.

People can be nice, but they can be mean.
I feel that as a race, we don't care much about upsetting people, as long as we get what we want.
I do not understand this. And I cannot accept this.

So people, think about others.