@timeflies Said 
I'm a boy, 14, english. I'm not paticularly popular, a few friends but not that many. I'm really shy and never want to try anything. I'm rubbish at sports but I'm not fat. There's a girl I really like (my neighbour) but I only talk to her over msn, I'm too scared to even flirt, let alone ask her out, I spend most of my time on my computer, I'm pretty much just a big nerd. I get sad quite often but depressed. I'm quite nice but definitely not cool. I just don't know what to do. I've given up trying anything. Does anyone have any advice about anything at all? how to get the girl, what to do, how to make new friends, anything.
Make changes one step at a time..
With your friend (girl) on msn, since you already talk to her via this way, and I'm assuming since you do chat that she likes you back.
So why not just tell her how you feel about her via msn, but add, that you'd love to meet her in person, but want to warn her that you are 'extremely' shy..
Be honest. She will most likely be flattered, and will jump at the chance to meet a guy who is interested in her already, and that she can take the lead with.
Knowing that 'you' are shy beforehand, will make her relax that much more.
Good luck hon, and let us know how it went.

...and don't be a chicken! Do this, she can't get you through the computer, if it's gets to be too much, you can always sign out.
