At my school, people NEVER get pinned. You only get dropped. Even so, it is up to the guy if he wants to drop you. Usually the guys in his fraternity know you well and like you and so they are supportive of him. Also, I am now engaged to a fraternity man (who just graduated) but he never dropped me. This is because we tried hard for our relationship to not be centered around being greek. It was part of who we were, but not the reason that we were together. We love our respective groups, but just chose not to do the whole drop thing. However, I did get my song circle when I became engaged and I loved it!