If you are half gay and half strait will you be gay sooner or later?

That would be what people call Bi-Sexual. Many people can live to be Bi-Sexual all their life. Example: If a woman likes to have sex with both men and women, she is Bi-Sexual. But if she is in a stable relationship with either a man or a woman then they might 'swing' from time to time with people of the bi-sexual partners same sex. Lots of people do, and it is not something that is uncommon. Just because you like both men and women does not mean that you will ultimatley turn gay.