If you like a guy but he likes you back how do you ask him out?

If you like a guy but he likes you back how do you ask him out?
Just walk up to him and say "How YOU doin'" Joey style.
walk up to him and ask how he is doing then after he answers you can do some short talk with him because he also might ask you out. And if he doesnt then you can just ask him. You might want to ask him somewhere in privite but you can ask him at school during studyhall or something. I hope that helps.