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.

It makes me so happy to see this thread is still alive. I reread all of it, and remembered my anxiety before Christmas, and my joy after it. You probably want an update, and you guys deserve it. Thanks to this board I was able to sort my mind and priorities. Perhaps not as much due to the always reliable advice from Anonymous (not :P ) but because writing all this helps me think and sort things out.

Our relationship is great. Like I said, we've been going out separately, then meeting somewhere. We're back at uni and finals are around the corner, so we have a bit less time to date, but we still go out at least twice a week.

I'm so deeply in love with this woman I could scream. I could laugh maniacally. She's my perfect match. In two days we'll make one month since we first went out, and yet my life has changed so much it feels like much longer. More and more I'm starting to believe this could really work. We went through the early stages of a relationship in a few days, since we already knew each other and shared so many things, and in a month we barely had one argument (more like a discussion where we didn't agree) over something stupid, and the way we handled it gives me a lot of confidence that this is going to last. We talk a lot, we cuddle a lot, and we date quite frequently and never run out of things to do. That movie is out, let's go here, I want to buy this, and sometimes we just have dinner, we enjoy doing the simplest of things, which is another good sign. And we lay a hand here and there when people's not looking, though it's always over the clothes.

A couple of days ago I laid a hand on her butt as we were waiting for a bus and she smiled and looked at me, but it wasn't the usual "you pervert" smile, but the "I love you" smile, so I kept fondling for a minute, and she rested her head on my shoulder. Needless to say, my hard on must have ranked second after George Zimmer.