Sorry to hear about the rejection - but hey, it is rare to have an interviewer being so impressed that he/she would offer to refer you in 2 years. You must have left a very good impression!
Regarding what position you should aim for in the next 2 years, it highly depends on the work experience you are planning to get in that period of time.
The only experience that might qualify you for the junior associate role, is consulting experience (from at least one of top tier-2 companies) or maybe (less likely) investment banking or private equity
Anything other than that would make it very hard to apply for anything other than analyst. So maybe try to focus your efforts on BCG/Bain, tier-2 or boutique consulting...life isn't about McK only :)
I hope this helps