Maybe having friends just isn't worth the emotional investment? 

Like, you have friends that you've known for a long time and shared some good times with, but then they go through a rough patch in life, and at first you want to help them but, after a while, you've suffered so much for their sake that you just wanna cut yourself off? 

Have you ever felt like you might be happier if you just didn't have any friends in the first place - so there'd be no one you'd have to worry about, and you can just focus on what makes yourself happy?

Have you ever almost felt like abandoning the friends you care the most about [i]because[/i] you care about them the most, and they hurt too much to be around?

And if so, is that selfish? Is it wrong to even think like that?