Is it unfair to think that friendships and perhaps every relevant relationship between human beings require a certain balance?

Perhaps not a 50-50% of shared good and bad things, maybe a 60-40...

Maybe I am a terrible person, but the fact that someone decides to share only the negative aspects of their life with friends, or the fact that they can't even picture positiveness around them make me desperately want to run away.

I don't consider myself a bad friend, on the contrary. But why should I endeavor myself in fights in which the main character of the story (and the one who will obtain the most benefits if I may say)is not even trying to get into?

I'm giving up on you people of rooted negativity and limited ability to see the bright side of things... even though I am sure that there is something to cherish in you, at this point I don't think it levels for the effort and energy your attitude drains from me.