Help /lounge, I love my sister

Over the past year I've been trying to lie to myself, to think on something else, even got laid and tried to fall in love with other girls, anything but admitting what I, deep down inside, already knew.

I love my sister. Not in the way most brothers love their sisters, but in the way a man loves a woman. Not because of some silly fetish either; when I say love, I mean real, "I'll go to the end of the world for you" love.

My sister is only one year younger than me, making her 20, and currently doesn't have a boyfriend. She's pretty, at least to my eyes, but this is not fueling this. It's her personality. I like no other girl this much. We always had a lot of chemistry,  it's as if we were engineered to be together. Only we happened to share our parents. I'm sure if we had been born in different families, we would be the happiest couple in the world right now.

Lately, I realized I could not give up on this, but I'm kind of scared. I know this is fucked up. But I don't know what to do. I've been avoiding her for a couple of weeks, and this is causing her suffering, which in turn breaks my heart. I don't know if I should confess my love and face the consequences of experiencing a kind of love that's considered unacceptable in our society, even from her, or just let it pass and die inside.

Help me /lounge, what should I do? I think she may be feeling something similar for me becuase we are very close and she considers me attractive, but I don't know to what extent this may only be wishful thinking on my part. Knowing her, I'm sure she won't be angry at me if I tell her how I feel, but I don't know for sure if she'll feel the same about me. I'm positive our parents and everybody else in our family and community will oppose such love, but if she loves me, I'm willing to face all of them or move to some other country to start a new life with her. But I wouldn't want to put pressure on her or make her feel uneasy, so while I think I should confess, I'm not 100% sure and I don't know to what extent what I think is distorted by my strong affection for her.

http://edition.cnn.com/2007/HEALTH/02/14/kinship.reut/index.html

WASHINGTON (Reuters) -- Researchers who wanted to find out why it is not only taboo to kiss your sister, but also disgusting, said Wednesday that they have discovered why in a discovery that challenges some basic tenets of Freudian theory.

The instinct evolved naturally and cannot be taught, John Tooby and Leda Cosmides of the University of California Santa Barbara wrote in their report in the journal Nature.

Spending time in the same household and watching your mother care for your brother or sister is all it takes. This is all subconscious, of course, reported the researchers, who worked with Debra Lieberman of the University of Hawaii.

"We went in search of a kin-detection system because some of the most important theories in evolutionary biology said such a thing should exist," Cosmides said in a telephone interview.

"It should regulate both altruism and incest disgust."

Humans have an inbuilt system that does both, they found.

"This data shows that the degree to which we feel those things is governed by these cues that, for hunter-gatherers, predict whether somebody is a sibling. And it works regardless of your beliefs -- who you are told who your siblings are," she said.