Can the bible clear it up?

I was really excited to have a piece of reading about homosexuality and the bible. Through my years growing up I have struggled to see where the bible is truth and what is interpretation. My mother brought me up to question such pieces of literature. Yet I still found myself having a hard time to commit to when the basis of the religion is from a book that is "out of date" and most customs come from Pagan rituals. I have also come in contact with some Christians that are hypocritical, which helped me lead to my annoyance.

Some Christians condemn homosexuals because they believe it is wrong and stated clearly in the bible. I myself have not done enough research to conclude if that is true or not, but it would still just be MY interpretation. When I was in 6th grade I attended a Lutheran church where I was told since I was baptised I would go to heaven. It didn't matter in the end what I believed in. While my friends have said that my belief is wrong and if I don't accept Christ fully I will go to hell. This of course lead to a huge discussion between my friend who then pulled out her bible and started quoting lines to me. I tried to argue that the lines she choose where just her interpretation and that I could use any other line to warp them to my beliefs, but I was still ignored.

I personally don't see the harm in homosexual marriages. I believe it is every human's right to live their own life without interference. I don't understand how some believe that if two women or men marry it will harm them. Where do we draw the line of telling people what to do? We have already interfered in Iraq, and for what purpose? I sincerely don't know. We didn't seem to care too much what Hitler was doing in Europe until Japan bombed Pearl Harbor. Which makes me see a tie between the Trade towers. So of course we only step in once it caused us harm. I'm beginning to ramble and losing my points....BUT I think it is important that we can't rely on one piece of literature to decide on our morals, our justice system, and ethics. Being agnostic I pride myself on the ability to treat others the way I would like to be treated, to act morally because it makes me feel good. I know I have done right in my mind and don't have to worry about the recognition from a religious community. I wouldn't want anyone to tell me who I can marry, who I can be friends with, or most basically, what to do in my life. So I don't think that anyone else has that right.