Gay Rights...?

I am thrilled we have Obama as President-Elect. But I am really confused on how a country can elect Obama but still ban gay marriages? It really disappoints me that we as country don't give everyone equal rights. Even though that is one the foundations of this nation. I don't get it. I have had happy tears going last night and this morning but have some sad tears going now too. I have several friends that got married this past year - I was so happy for them and I hope that their marriages won't be annuled. And I hope that those bans are overturned and others who I love can get married too.