lol mamo, "dweeb". What an awesome name. I'm so giving myself that title.
As for, 'what is a nerd/geek'? I don't really think one or the other is described as being antisocial. If someone's antisocial, then they're a loser. A nerd is a fanboy, and I'm sure we all know what this is. A geek is a person less-than-often described as "brainy". But I don't think one or the other is less likely to have friends or make friends... that depends on, well, confidence and personality and background and !@#$%.
I'd actually have to say that I am neither nerd nor geek. I have obsessions with games, but I usually keep that obsession at home. I've got mild computer-smarts, but I don't express that anywhere, even if someone asks me something about them. I'm more of a... people person. I don't know, there's a lot of people around me who have interests in a particular anime or game or comic, but they're also really social people. I guess that's what I am too.