@Star_dust Also we are living in 21st century,with the invention of new stuff like smartphones,internet,television,video games,porn etc no one is bored of being lonely so it's not much of a deal i guess.

@Karina-Kara
People care to feel good.
Making someone feel better gives you quite a good feeling.

Its not a direct objective but rather what happens so people keep doing it. Especially with negative feelings as the feeling of joy and sorrow combined feels good