relationships

I just had a general question for all of you greeks. I just graduated from high school and I was in a 2 year relationship but he is 1 year younger than me. As I was looking over stuff for college, I mentioned that I was interested in rushing and he said that he refused to support me in this decision. We have since broken up, but I was wondering, is this a common reaction to this? I have heard from others in sororities that being in a sorority is all about meeting guys and this girl became inactive (I don't know if this is the right term, but you know what I mean) when she got into a long term relationship. She said that you don't really want a non greek boyfriend if you are in a sorority. Is any of this at all true?