forbidden love!!!

During my first year in college I joined fraternity/Sorority. It's not that easy,maybe you already have an idea what I've gone through just to belong to the group. I enjoyed going together with my brothers and sisters. As time goes by I met and get along with one of my brothers. We've been goods friends 'til we both feel something strange, we can't go somewhere without the other. Until we can say that we love each other. All my brothers and sisters were mad, it's so hard because we see each other everyday, most of us living in the same boarding house. We left the group and chose to continue our relationship. But everytime I saw my brothers and sisters we still feel so guilty because it's againts the rules of the group. We're almost six years and still we're together but i suffer lots of heartaches and disappointments. But I love him and he's trying his best to be a good partner. But he's busy, we have a hard time spending time with each other this time. Do you think we can be together forever? Any tips to make our relationhip stronger despite of the situation we have?