[quote name='WiiShopChannels']So I wanted to ask out this girl to the dance this Friday, but IDK how to do it. I haven't talked to her since last year and personally, I think it seems weird just going up to her out of no where and asking her. Is there a certain way to do it?[/QUOTE]
Whatever you do, don't make it out to be a bigger deal than it is.
Just say, "I'm thinking about going to the dance Friday and I wanted to know if you'd like to go?"
She'll either say yes, or no. If she says yes, go with her.
If she says no, realize it isn't the end of the world and just find someone else to ask.
It's not weird to ask out of nowhere, that's generally how it is going to be no matter what, regardless of the last time you talked to someone. Just ask with confidence and regardless of her answer accept it and move from there.