Well, do you know him well?Do you know what activities or movies or music or what not that he's into?
Put things he likes to do in context when you ask him out.
And just be all out there.
Confidence is a good thing.
But don't be like, cocky.
Just... Have faith in yourself.
Strike up a conversation first,
And then bring like, a movie, for example, into the conversation...
and then be like "oh hey, would you like to go see (insert film) with me?"
and how to look good...
just pick out your nicest clothes basically.
I second that. So long as you keep your cool and talk in a slow, yet steady pace, asking him out would come off as completely natural and not forced. I'll re-explain: If, as the above people mentioned, you bring up a conversation on what he likes, try to drag the conversation a little further before asking him. This way, it'll seem like two
friends going out, and not as an actual date. Maybe if you make an effort to dress your best, he'll catch the hint that you like him? Or try to give as many indirect hints that its a date without trying to make it seem too obvious (i.e. showing up 30 minutes before) if not, simply ask him out directly and get straight to the point and over with.
Do you know already whether he likes you (at least as a close friend?) If you don't know whether he likes you or not, you might want to select a
trustworthy friend who might start a conversation with the person you like when you're not there. And that friend might suddenly bring you up into the conversation, sort of like: "...speaking about that, did you know Chris likes *insert name of sport, movie, or whatever* too?" or, "Speaking of Chris...what do you think of him?"
That might not be the best idea, but seeing as how I'm no expert on relationships myself, the choice on whether or not you want to take it is of course, entirely up to you.