I feel uncomfortable in my own skin.

This is my first post, and I seek support. So it would mean so much to me if you took the time to read it through.
As the title says I feel really uncomfortable being who I am. I feel like a slum. I am very shy, and I basically just want to disappear.

What I first of all don't like about myself is my look and ethnic background. I have a darker appearance compared to where I live (Scandinavia). I am an immigrant, and I don't like it. People often think I'm turkish or middle eastern even though I'm serbo-croatian. I feel so bad about it, I wanna be white so damn much. It has got to the point where I've dyed my black hair brown, I avoid sun at all cost to prevent tanning, and I'm thinking of starting using light contact lenses to hide my dark eyes. I've even been thinking of plastic surgery to look more european. I have been posting pictures of myself at different forums, desperately asking how I could change my look and to guess my ethnic background. Someone on a forum told me that I'm very insecure and have a low self-esteem, and that I should seek help, so I'm doing it here.

I am very unpopular. People like making fun of me, saying things like " You're a chronic virgin", "What went wrong at your birth?" or that I'm disgusting. It's not that they don't like me, they just say it because they think it's for fun because they don't see anything wrong with saying stuff like that.
I've basically got to the point where I don't like to look at myself in the mirror anymore, but I still do it many times a day because something inside me wants to look at how ugly I am, I don't know why.

I have never got much attention from my peers, so therefore I started seeking attention in negative ways, like by being disgusting, behaving inappropriately etc. So when I was 10 to around 12-13, I was bullied really badly. My whole class told me I was disgusting, nobody wanted to touch me, nobody wanted to sit in a chair that I just sat in. It was my whole class against me. And the worst thing was that teachers blamed me and said that it was my own fault that my peers behaved as they did. So I had no one, and I mean asolutely no one by my side. It took away my confidence and self-esteem, which I to this day still don't have.
A minor insult can insult me very badly, and I experience them often.

I am very lazy, and my whole day (except for school) consists of spending time in front the screen, googling random things, checking my facebook, watching tv, thinking the same thoughts over and over again. I was a smart kid in primary school, but now I'm just lazy and unworthy.
Not to sound like a douche, and this is really a private part of me, but I still want to share it. What really bothers me is that I'm almost 18, and I'm still a virgin. All my peers have tried to have sex, but I can only dream about it. I really feel like a disgusting scum, no one wants to be around.

I have a dream that I've had for many years, but I still haven't done anything about it.
My dream is to make music, I know a little guitar and I want to start singing, and I have very good ideas for making music, but when I pick up the guitar, something inside me tells me that I will never make it, and then I put the guitar away instantly. It is sad how the years are ticking away, and I'm accomplishing 0% of my dream. My lack of self-worth prevents me from it. And that evil little thing inside me tells me that an ugly scum like me will never accomplish anything.

Soon I'm turning 18, and everyone who celebrates their 18th birthday, makes a big celebration with lots of friends. But I have no true friends, and therefore I have to celebrate it alone with my family, which is so miserable in my point of view.

Thank you for reading it all through. It was good to get it all out on paper, and I hope to get some kind of support to see what I can do to improve my life.

Best regards