What disturbs me is you are disassociating yourself from your friend for the sake of "discretion." I'm pretty sure that before he was greek, the two of you discussed your aspirations, so he's aware of them. And I'm also sure you're not advertising yourself as a future or soon-to-be chi upsilon zeta. I would think that regardless that he has transitioned into the organization you wish to join, you'd be proud to be tagged in photos of him. I mean, it's not like folks don't know y'all are cool and have been for a while. Don't let your friend's being greek change you.
Can we be clear on something? Delta G.E.M.S., Sigma Beta, Kappa League, et. al., ARE NOT "Jr. Greek" organizations. They are enrichment/mentoring programs, grooming you to be better young adults and better people. Being a member of any of these groups does not necessarily mean that you will become a member of the sponsoring organization (although we would LOVE for you to) or any other greek organization. Yes, they've developed, and have been taught, steps, have calls, jackets, names and numbers. Recognize it for what it is, and don't make it something that it's not.