I think this show gets you thinking about yourself, the whole faking emotions. When you watch it, you think to yourself, how can he not feel this way? But you realise, he's Dexter, that's what he's like. I think the OP is saying that sometimes, you can feel alone, feeling like you have to deal with things on your own, but obviously, not to Dexter's extent!!
I have to admit, I've found myself putting myslef in Dex's shoes, and when you do, it's a mad place to be!! We all know this is a tv show, and it's all fiction, but it plays on the dark side of your mind, and what could be, if you had the balls. Dex is the ultimate anti-hero, and you should'nt like him for what he does, but c'mon!! There's not one person who was punching the air when he grabbed the knife off his brother in the last series!! Debs is annoying, but she's the annoying sis that we'd all love to have, and to see Dex showing a bit of his non existant emotion to save her had you on the edge of your seat!!...
I won't kill my sister...I won't kill my sister...I won't kill my sister...