Okay this isn't exactly what you want, since neither of the boys hit on each other. However, this does start off with one being gay and the other not realizing he's into guys (or the other J) until later in the story. So if you're interested here's the link.

http://angels3.livejournal.com/12811.html#cutid1

Oh thank you! ;)

You're welcome.

Hmmm...this isn't exactly what you want either, but it does involve one J pusuing the other (non-gay but more because he hasn't admitted it to himself) J:

http://lady-krystal-79.livejournal.com/15296.html#cutid1 (Dupe of Friendship)

IDK, my BFF Jensen by mediaville is along those lines: http://mediaville.livejournal.com/45348.html