I was a teen in the 1950's and that was quite common. The guy is probably too shy and feared rejection so he had his friend talk to you. If you know this guy that wants to ask you out and you like him then tell your friend that you'll go out with this guy. If you don't like the guy then say no.
You dont tell you ask or get one of your friends to ask or get one of his friends to cough up the info.
Ask him or ask one of his friends that you are friends with too. Then you would know, even if it was indirectly.
...ask one of his friends (if you are their friend also) to ask him subtly
you get one of your friends to ask him if he likes you, then tell that friend to ask you out
ask one of his close friends for it
get one of your friends to ask him and if he says no just move on.
Tell one of YOUR friends to ask one of HIS friends of what he thinks of you. If he seems interested in you, then GO FOR IT AND ASK!!!! If not, then stalk him like there's no tomorrow to figure out why!!
If you like him enough, ask him. If you are just interested, get a friend to ask one of his friends if he has one.
If youre unsure then get one of youre friends or one of his friends to ask him who he likes or if he likes you
talk to your friends and make a one week plan about it.
ask one of you're friends to ask the boy what he thinks of you but make sure that you're friend doesn't mention that you told her to ask him.
ask him, or ask his friends