Should I ask this guy out?

I think that you should think about all the possibilities. If you tell him and he likes you back then go from there. If he says no than you should be able to trust him as one of your best friends and trust that he will still be your friend and act like nothing happened. But, if you don't say anything you can be sure that your friendship will stay put. Or maybe you could just sit him down and ask him if he likes you and don't tell him you like him until he tells you and if he says no just say oh just wondering (but no facial expresions). Hope all goes well between the two of you. :) <3