Maybe you have some common friends and you could get the chance for all of you to hang out together
Or if not, like said above, just find some pretext to be around him, like borrowing something. The trick when you are around him is, you could try to act confident and a bro-ist boyish attitude towards him, "brozone" him a little, get him the impresion that he needs you more than you need him. I think a lot of guys would be attracted by that :P
Source: a guy