Ummmkay, this is what I'll do. I'm not going to apologize to any current members, because they were not around last fall. Because, some of the alums are very close to a lot of current members and may have influence over them, I may apologize to them one on one whenever I get a chance.
Shadokat and CT4 are right, this is only the tip of the iceberg. Some reasons why we are having trouble w/ membership is because A. We are mostly a commuter campus and people are always transferring. B. Too much power-tripping in the beginning. C. We just got our charter last April, and before then things were VERY disorganized. D. Our main emphasis is supposed to be service, we haven't been doing too much of that

E. Some people are uncomfortable with the solidarity of some members (that's the main thing that pissed my ex-friend off), I understand, some of them work with each other and/or know each other from other organizations. It's only natural for them to be closer. But, a lot of other people DON'T understand that and is a turn off to them, they feel left out.
I don't even know if they are aware that is the reason why we are losing people because of that.
I really really want to address "E", but don't know how to TACTFULLY. I don't want a repeat of last year of creating more drama and losing even more people including the advisor, whenever I addressed the problems.