The way you look at this problem seems to be all about superiority complexes. What I read from you is:
Stepping back into a false skin so you can fit in with friends that you outgrew, oh and you're on different levels too.
That doesn't just say you've changed, that says you're ahead/above of them. To reconnect you seem to be under the impression you need to try to revert your education to connect at their level. I'd suggest you never really had a connection with them, only with what they were interested in at that moment in time.